21 Top Neck Flasks for 2020

 

Chemglass CG-1530-15 Glass 5000mL Round Heavy Wall 4 Neck Bottom Boiling Flask with 4550 and 2440 Standard Taper Outer Joint

Chemglass CG-1530-15 Glass 5000mL Round Heavy Wall 4 Neck Bottom Boiling Flask with 45/50 and 24/40 Standard Taper Outer Joint

Chemglass CG-1530-15 Glass 5000mL Round Heavy Wall 4 Neck Bottom Boiling Flask with 45/50 and 24/40 Standard Taper Outer Joint - Round bottom, heavy wall, four neck flask with standard taper outer joints on the center and vertical side necks.

 

Laboy HMF011302 Glass 25 mL 2 Neck Round Bottom Boiling Flask with 1420 Center and Side Joints Angled

Laboy HMF011302 Glass 25 mL 2 Neck Round Bottom Boiling Flask with 14/20 Center and Side Joints Angled

Laboy HMF011302 Glass 25 mL 2 Neck Round Bottom Boiling Flask with 14/20 Center and Side Joints Angled - With 2 necks having the same joints laboy glass flasks are heavy wall designed, made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glass and annealed at 800 degree celsius, can be heated directly in an open flame and can withstand typical laboratory thermal variations in chemistry processes like heating and cooling. This multi-neck flask has two standard taper ground joint on the centre neck and the side angled neck.

 

Chemglass CG-1522-07 Series CG-1522 Heavy Wall Round Bottom Flask 3-Neck 1-CN 2440 Outer Joint 2-SN 2440 Outer Joint 1000 mL Capacity

Chemglass CG-1522-07 Series CG-1522 Heavy Wall Round Bottom Flask, 3-Neck, 1-CN 24/40 Outer Joint, 2-SN 24/40 Outer Joint, 1000 mL Capacity

Chemglass CG-1522-07 Series CG-1522 Heavy Wall Round Bottom Flask, 3-Neck, 1-CN 24/40 Outer Joint, 2-SN 24/40 Outer Joint, 1000 mL Capacity - Round bottom, heavy wall three neck flask with standard taper outer joints on the center neck and vertical side necks. Flasks with joint sizes other than those listed are available. Please call for pricing. Flasks with 29/26 center necks have a groove tooled just below the grind to aid in clamping of the flask.

 

Chemglass CG-1508-18 Series CG-1508 Heavy Wall Round Bottom Flask Single Short Neck 3525 Socket Joint 5000 mL Capacity

Chemglass CG-1508-18 Series CG-1508 Heavy Wall Round Bottom Flask, Single Short Neck, 35/25 Socket Joint, 5000 mL Capacity

Chemglass CG-1508-18 Series CG-1508 Heavy Wall Round Bottom Flask, Single Short Neck, 35/25 Socket Joint, 5000 mL Capacity - Round bottom, heavy wall single short neck flask with a spherical socket joint. Flasks having a 35/20 socket joint are used as replacements for the collection flask on rotary evaporators.

 

StonyLab Borosilicate Glass 25mL Heavy Wall Single Neck Recovery Flask Rotary Evaporator Flask with 2440 Outer Joint - 25mL

StonyLab Borosilicate Glass 25mL Heavy Wall Single Neck Recovery Flask Rotary Evaporator Flask, with 24/40 Outer Joint – 25mL

StonyLab Borosilicate Glass 25mL Heavy Wall Single Neck Recovery Flask Rotary Evaporator Flask, with 24/40 Outer Joint – 25mL - We boast excellent customer service with a high satisfaction rating, with our team of representatives ready to assist you monday to friday, from 930am to 530pm eastern time. Why choose stonylab 1. Stonylab borosilicate single neck glass heavy wall recovery flask rotary evaporator flask, with 24/40 outer joint. 3. The stonylab means high-quality products for reasonable prices. 2. We pack and ship your orders directly from our us-based warehouse within 24 business hours, and tracking information will be provided to you as soon as it’s available.

 

Erlenmeyer Flask 5000ml - Borosilicate Glass - Narrow Neck Conical Shape - White Graduations - Eisco Labs

Erlenmeyer Flask, 5000ml – Borosilicate Glass – Narrow Neck, Conical Shape – White Graduations – Eisco Labs

Erlenmeyer Flask, 5000ml – Borosilicate Glass – Narrow Neck, Conical Shape – White Graduations – Eisco Labs - Eisco glassware is designed to be used in labs but is often used in homes or garages as well. Hand blown premium borosilicate 33 glass. Top rack dishwasher safe and autoclavable. This flask is huge seriously and extremely thick and heavy it’s base is 85″ in diameter and it weighs over 3lbs. 500ml graduations.

 

Laboy Glass 100mL Single Neck Round Bottom Boiling Flask Heavy Wall with 1922 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware

Laboy Glass 100mL Single Neck Round Bottom Boiling Flask Heavy Wall with 19/22 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware

Laboy Glass 100mL Single Neck Round Bottom Boiling Flask Heavy Wall with 19/22 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware - High quality—laboy glass condensers are all made of high quality boroslicate glass according to astm e438,heavy wall design,durable and reusablethe ground joints are precisely grounded according to us standard. Standard size— this round bottom flask designed with 19/22 standard taper outer joint,interchangeable,leak-free,comparing to common boiling flask without ground joint, it is convenient,safe,easy-operation in laboratory glassware setup capacity of 100ml. Buy with confidence—-100% 90 day money back guarantee simply return for a full refund,no question asked. Widely used—-the round bottom flask is widely used in organic chemistry,in a distillation or vacuum distillation apparatus ,it’s used a a distillation flask and receiving flask with a glass condenser and some adapters like the 14 way distillation adapter,take-off adapterin a reflux process,it’s used as a reaction flask with a reflux condenserit is also used as a distilling flask in rotary evaporators. Heat-resistant design —with spherical bottoms,this rbf is more resistant to fracturing under vacuum, as a sphere more evenly distributes stress across its surface laboy glass flasks are heavy wall designed,made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glass and annealed at 800 degree celsius ,can be heated directly in an open flame and can withstand typical laboratory thermal variations in chemistry processes like heating and cooling.

 

Erlenmeyer Flask 100ml - Borosilicate Glass - Wide Neck Conical Shape - White Graduations - Eisco Labs

Erlenmeyer Flask, 100ml – Borosilicate Glass – Wide Neck, Conical Shape – White Graduations – Eisco Labs

Erlenmeyer Flask, 100ml – Borosilicate Glass – Wide Neck, Conical Shape – White Graduations – Eisco Labs - Eisco labs borosilicate glass has the following heat tolerances strain point -515°c | annealing point 565°c | softening point 820°c. Low temperature gradient- can withstand high temperatures & thermal shocks. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. Eisco labs proudly manufactures its own products using state-of-the-art equipment, and following the highest standards of quality control. Glass erlenmeyer wide neck flask 100ml, borosilicate ( single flask ) autoclavable, with superior chemical durability. They are manufactured with only the highest grade, raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.

 

Laboy Glass 2000mL Single Neck Round Bottom Boiling Flask Heavy Wall with 4550 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware

Laboy Glass 2000mL Single Neck Round Bottom Boiling Flask Heavy Wall with 45/50 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware

Laboy Glass 2000mL Single Neck Round Bottom Boiling Flask Heavy Wall with 45/50 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware - Standard size— this round bottom flask designed with 45/50 standard taper outer joint,interchangeable,leak-free,comparing to common boiling flask without ground joint, it is convenient,safe,easy-operation in laboratory glassware setup capacity of 2000ml. High quality—laboy glass condensers are all made of high quality boroslicate glass according to astm e438,heavy wall design,durable and reusablethe ground joints are precisely grounded according to us standard. Buy with confidence—-100% 90 day money back guarantee simply return for a full refund,no question asked. Heat-resistant design —with spherical bottoms,this rbf is more resistant to fracturing under vacuum, as a sphere more evenly distributes stress across its surface laboy glass flasks are heavy wall designed,made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glass and annealed at 800 degree celsius ,can be heated directly in an open flame and can withstand typical laboratory thermal variations in chemistry processes like heating and cooling. Widely used—-the round bottom flask is widely used in organic chemistry,in a distillation or vacuum distillation apparatus ,it’s used a a distillation flask and receiving flask with a glass condenser and some adapters like the 14 way distillation adapter,take-off adapterin a reflux process,it’s used as a reaction flask with a reflux condenserit is also used as a distilling flask in rotary evaporators.

 

StonyLab Glass 500ml Heavy Wall 3 Neck Round Bottom Flask RBF with 2440 Center and Side Standard Taper Outer Joint - 500ml

StonyLab Glass 500ml Heavy Wall 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 500ml

StonyLab Glass 500ml Heavy Wall 3 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 500ml - The package include stonylab glass 3 neck round bottom flask rbf, with 24/40 center and side standard taper outer joint. The stonylab means high-quality products for reasonable prices. 3. Why choose stonylab 1. It is heavy duty reusable single metric high quality. We boast excellent customer service with a high satisfaction rating, with our team of representatives ready to assist you monday to friday, from 930am to 530pm eastern time. The graduted cylinder is made of borosilicate glass. 2. We pack and ship your orders directly from our us-based warehouse within 24 business hours, and tracking information will be provided to you as soon as it’s available.

 

Laboy Glass 100mL Single Neck Round Bottom Boiling Flask Heavy Wall with 1420 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab GlasswarePack of 5

Laboy Glass 100mL Single Neck Round Bottom Boiling Flask Heavy Wall with 14/20 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware(Pack of 5)

Laboy Glass 100mL Single Neck Round Bottom Boiling Flask Heavy Wall with 14/20 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware(Pack of 5) - High quality—laboy glass condensers are all made of high quality boroslicate glass according to astm e438,heavy wall design,durable and reusablethe ground joints are precisely grounded according to us standard. Heat-resistant design —with spherical bottoms,this rbf is more resistant to fracturing under vacuum, as a sphere more evenly distributes stress across its surface laboy glass flasks are heavy wall designed,made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glass and annealed at 800 degree celsius ,can be heated directly in an open flame and can withstand typical laboratory thermal variations in chemistry processes like heating and cooling. Widely used—-the round bottom flask is widely used in organic chemistry,in a distillation or vacuum distillation apparatus ,it’s used a a distillation flask and receiving flask with a glass condenser and some adapters like the 11 way distillation adapter,take-off adapterin a reflux process,it’s used as a reaction flask with a reflux condenserit is also used as a distilling flask in rotary evaporators. Standard size— this round bottom flask designed with 14/20 standard taper outer joint,interchangeable,leak-free,comparing to common boiling flask without ground joint, it is convenient,safe,easy-operation in laboratory glassware setupcapacity of 100mlpack of 5pcs. Buy with confidence—-100% 90 day money back guarantee simply return for a full refund,no question asked.

 

Across International SP-10L3N 2440 3445 Heavy Wall 10 L Round Bottom 3-Neck Flask

Across International SP-10L3N 24/40 34/45 Heavy Wall 10 L Round Bottom 3-Neck Flask

Across International SP-10L3N 24/40 34/45 Heavy Wall 10 L Round Bottom 3-Neck Flask - 3. If you believe there are imperfections on your glassware, please contact us. Glass material high borosilicate glass 3. We check all our inventory and make sure no defective glassware is sent to our customers. Glassware may have minute blemishes that will not affect the function. Comes with two vertical 34/45 side necks and one 24/40 center neck. Glassware does not have warranties. Across international 10l heavy wall, 3-neck round bottom flask with 24/40 and 34/45 standard taper joint.

 

Laboy HMF011435 Glass 1000 mL 3 Neck Round Bottom Boiling Flask with 2440 Center and Side Joints Angled

Laboy HMF011435 Glass 1000 mL 3 Neck Round Bottom Boiling Flask with 24/40 Center and Side Joints Angled

Laboy HMF011435 Glass 1000 mL 3 Neck Round Bottom Boiling Flask with 24/40 Center and Side Joints Angled - This multi-neck flask has three standard taper ground joint. With 2 necks having the same joints laboy glass flasks are heavy wall designed, made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glass and annealed at 800 degree celsius, can be heated directly in an open flame and can withstand typical laboratory thermal variations in chemistry processes like heating and cooling.

 

Precision 250mL 2440 Single Neck Round Bottom Flask Heavy Wall Borosilicate Glass

Precision 250mL 24/40 Single Neck Round Bottom Flask, Heavy Wall, Borosilicate Glass

Precision 250mL 24/40 Single Neck Round Bottom Flask, Heavy Wall, Borosilicate Glass - Round bottom flask with standard taper outer joint. 301026 style single neck, round bottom flask size 250 ml joint 24/40 material borosilicate glass astm spec e438 supplier precision labware. Heavy wall design provides increased mechanical strength. Catalog no.

 

Laboy Glass Single Neck Round Bottom Boiling Flask Premium Borosilicate Glass Heavy Wall Design 50mL with 1922 Joint Chemistry Lab Glassware 6pcs

Laboy Glass Single Neck Round Bottom Boiling Flask Premium Borosilicate Glass Heavy Wall Design 50mL with 19/22 Joint Chemistry Lab Glassware 6pcs

Laboy Glass Single Neck Round Bottom Boiling Flask Premium Borosilicate Glass Heavy Wall Design 50mL with 19/22 Joint Chemistry Lab Glassware 6pcs - 100% 90 day money back guarantee simply return for a full refund without any reason. Uniform heavy wall round bottom flask,made of borosilicate glass 33 by hand-blowing. Used in organic chemistry with lab glassware having taper joints like thermometer adapter etc. 19/22 glass flask 50ml ,round bottom ,single neck,can be heated directly at temp up to 800 degree c. Used as boiling flask,distillation flask,receiving flask for distillation, fractionation,extraction etc.

 

Precision 500mL 2440 Three Vertical Neck Round Bottom Flask Heavy Wall Borosilicate Glass

Precision 500mL 24/40 Three Vertical Neck Round Bottom Flask, Heavy Wall, Borosilicate Glass

Precision 500mL 24/40 Three Vertical Neck Round Bottom Flask, Heavy Wall, Borosilicate Glass - Three-neck round bottom flask with standard taper outer joints of 24/40 on both the center neck and vertical side necks. 303227 style vertical, three-neck, round bottom flask size 500 ml joint 24/40 material borosilicate glass astm spec e438 supplier precision labware. Heavy wall design increases mechanical strength. Catalog no.

 

Chemglass CG-1506-14 Glass 200mL Heavy Wall Single Neck Round Bottom Flask with 2440 Standard Taper Outer Joint

Chemglass CG-1506-14 Glass 200mL Heavy Wall Single Neck Round Bottom Flask, with 24/40 Standard Taper Outer Joint

Chemglass CG-1506-14 Glass 200mL Heavy Wall Single Neck Round Bottom Flask, with 24/40 Standard Taper Outer Joint - Round bottom, heavy wall single short neck flask with a standard taper outer joint. The 29/26 flasks have a groove tooled just below the grind to aid in clamping of the flask. Flasks with joint sizes other than those listed are available.

 

Chemglass CG-1520-14 Glass 1000mL Round Heavy Wall 2 Neck Bottom Boiling Flask with 2440 Standard Taper Outer Joint and 20 Degree Angle

Chemglass CG-1520-14 Glass 1000mL Round Heavy Wall 2 Neck Bottom Boiling Flask with 24/40 Standard Taper Outer Joint and 20 Degree Angle

Chemglass CG-1520-14 Glass 1000mL Round Heavy Wall 2 Neck Bottom Boiling Flask with 24/40 Standard Taper Outer Joint and 20 Degree Angle - Flasks with 10/30 side neck are for use with cg-3506 thermometers. The 29/26 center neck flasks have a groove tooled just below the grind to aid in clamping of the flask. Flasks with joint sizes other than those listed are available. Round bottom, heavy wall two neck flask with standard taper outer joints on both the center neck and angled side neck.

 

Laboy Glass 500mL 4 Neck Angled Round Bottom Boiling Flask with 2440 Center Side Joints

Laboy Glass 500mL 4 Neck Angled Round Bottom Boiling Flask with 24/40 Center & Side Joints

Laboy Glass 500mL 4 Neck Angled Round Bottom Boiling Flask with 24/40 Center & Side Joints - With 4 necks having the same joints laboy glass flasks are heavy wall designed, made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glass and annealed at 800 degree celsius, can be heated directly in an open flame and can withstand typical laboratory thermal variations in chemistry processes like heating and cooling. This multi-neck flask has four standard taper ground joint.

 

Kemtech F444250 Synthware 3-Neck Flask Round Bottom Vertical 2440 CenterSide Joint 250 mL

Kemtech F444250 Synthware 3-Neck Flask, Round Bottom, Vertical, 24/40 Center/Side Joint, 250 mL

Kemtech F444250 Synthware 3-Neck Flask, Round Bottom, Vertical, 24/40 Center/Side Joint, 250 mL - 1000ml capacity with 200ml graduations. Wide neck flask. It has three neck flasks with standard taper outer joints on both the center neck and the vertical side neck. (1) single flask. High quality borosilicate glass.

 

Across International SP-2L2Ns 2440 Heavy Wall 2 L Round Bottom 2-Neck Flask

Across International SP-2L2Ns 24/40 Heavy Wall 2 L Round Bottom 2-Neck Flask

Across International SP-2L2Ns 24/40 Heavy Wall 2 L Round Bottom 2-Neck Flask - Glassware does not have warranties. If you believe there are imperfections on your glassware, please contact us. 3. Glass material high borosilicate glass 3. Across international 2l, 24/40 standard taper joint, heavy wall, round bottom 2-neck flask with one vertical 24/40 neck, and one angled 24/40 side neck. We check all our inventory and make sure no defective glassware is sent to our customers. Glassware may have minute blemishes that will not affect the function.





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