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1. Glass Filtering Flask with Upper Tubulation, 2000ml
2. United Scientific FG5340-1000 Borosilicate Glass Heavy Wall Filtering Flask, Bolt Neck with Tubulation, 1000ml Capacity
Description
Borosilicate glass flasks are designed to give the best combinations of thermal shock resistance, physical strength, and resistant to chemical attack.
3. ULAB Scientific Glass Erlenmeyer Flask Set, 5 Sizes 50ml 150ml 250ml 500ml 1000ml, 3.3 Boro with Printed Graduation, UEF1002
4. StonyLab Glass 250ml Heavy Wall Borosilicate Glass Filtering Flask, Bolt Neck with Tubulation – 250ml
Description
SKU: XL-815076
Why Choose StonyLab?
1. The StonyLab means high-quality products for reasonable prices.
2. We boast excellent customer service with a high satisfaction rating, with our team of representatives ready to assist you Monday to Friday, from 9:30AM to 5:30PM Eastern Time.
3. 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.
The Graduted Cylinder is made of borosilicate glass. It is heavy duty reusable single metric high quality. The package include: StonyLab 250ml Borosilicate Glass Filtering Flask, Bolt Neck with Tubulation.
5. QWORK 250ml Borosilicate Glass Filtering Flask with Tubulation
Feature
- Clear Material – Made of high quality borosilicate glass, it is clear and easy to know the situation.
- Mouth – Our flask has a narrow mouth with the top finish.
- Capacity – It is 250ml capacity.
- Package – Our package incl. one piece of filtering flask
- 100% Satisfied Service – Enjoy a smooth & frustration free experience with our 100% Satisfied Service in one Month!
Description
Feature:
Made of high quality borosilicate glass, itis clear and easy to know the situation.
Our flask has a narrow mouth with the top finish.
Specification:
Material: borosilicate glass
Capacity: 250ml
Package:
1 x Filtering Flask
6. Laboy Glass 250mL Single Neck Round Bottom Boiling Flask Heavy Wall with 24/40 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware (Pack of 5)
Feature
- STANDARD SIZE— This round bottom flask designed with 24/40 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 250mL.Pack of 5pcs
- 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 adapter
- In a reflux process,it’s used as a reaction flask with a reflux condenser.It is also used as a Distilling flask in rotary evaporators.
- HIGH QUALITY—Laboy glass condensers are all made of high quality boroslicate glass according to ASTM E438,heavy wall design,durable and reusable.The 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
Description
Round-bottom flasks (also called round-bottomed flasks, Flasks, round bottom, or RB Flasks)having spherical bottoms are more resistant to fracturing under vacuum, as a sphere more evenly distributes stress across its surface. Because of the spherical bottom, cork rings are needed to keep the round bottom flasks upright. When in use, round-bottom flasks are commonly held at the neck by flask clamps on a stand. The flasks are usually used in heating or boiling a liquid, in distillation as distilling flasks and receiving flasks for the distillate, used as the distilling flasks in rotary evaporators. 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.
7. Laboy Glass 250mL Single Neck Round Bottom Boiling Flask Heavy Wall with 24/40 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware
Feature
- STANDARD SIZE— This round bottom flask designed with 24/40 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 250mL.
- 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 adapter
- In a reflux process,it’s used as a reaction flask with a reflux condenser.It is also used as a Distilling flask in rotary evaporators.
- HIGH QUALITY—Laboy glass condensers are all made of high quality boroslicate glass according to ASTM E438,heavy wall design,durable and reusable.The 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
8. StonyLab Glass 250ml Heavy Wall 2 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint – 250ml
Description
SKU: XL-815122
Why Choose StonyLab?
1. The StonyLab means high-quality products for reasonable prices.
2. We boast excellent customer service with a high satisfaction rating, with our team of representatives ready to assist you Monday to Friday, from 9:30AM to 5:30PM Eastern Time.
3. 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.
The Graduted Cylinder is made of borosilicate glass. It is heavy duty reusable single metric high quality. The package include: StonyLab Glass 2 Neck Round Bottom Flask RBF, with 24/40 Center and Side Standard Taper Outer Joint
9. Laboy Glass 250mL 2 Neck Round Bottom Boiling Flask with 24/40 Center & Side Joint Angled Distillation Apparatus Organic Chemistry Lab Glassware
Feature
- DESIGN—-Round bottom design having spherical bottoms are more resistant to fracturing under vacuum, as a sphere more evenly distributes stress across its surface. A cork stand is needed to keep the round bottom flask upright,or heated by the water bath ,oil bath or sand bath.Comparing to the single neck round bottom flask,this 2 neck flask featured an angled neck with standard taper joint as an extra opening.
- WIDELY USED—The 2 neck round bottom flask is widely used in the organic chemistry process like distillation, reflux ,extraction,reaction etc.In a distillation apparatus,the 2 neck round bottom flask used as the distillation flask,the straight neck attaches a 3 way distillation adapter or a distillation column(in fractional distillation),the other neck can be used to connect a thermometer adapter ,bleeding tube, or additional funnel.
- DIMENSIONS—–This 2 neck round bottom flask has capacity of 250mL, with 24/40 center joint & 24/40 side joint,attaching any lab glassware apparatus with standard taper joint.
- HEAVY WALL —The 2 neck flask is heavy-wall designed , made by hand-blowing according to ASTM E438 ,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,durable and reusable.
- 100% 90 DAY MONEY BACK GUARANTEE If you are not satisfied for any reason, simply return for a full refund, no questions asked. You have nothing to lose.Please also kindly undertand glassware is fragile, even if we pack them carefully,it may be broken during the shipment ,if you receive the items in broken status,don’t hesitate to contact us ,we will arrange free replacement or full refund.
Description
This multi-neck flask has two standard taper ground joint on the Centre neck and the side angled neck. 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.
10. Young4us Glass Erlenmeyer Flask Set, (250 ml, 150 ml & 50 ml) Graduated Borosilicate Glass Erlenmeyer Flasks with Rubber Stoppers & Accurate Scales for Lab, Experiment, Chemistry, Science Studies etc
Feature
- 3 RUBBER STOPPERS INCLUDED: This set has 3 rubber stoppers for these 3 Erlenmeyer Flasks, which are sterile & can seal the liquid in the flasks perfectly for experiment.
- ACCURATE SCALES: 3 Erlenmeyer Flasks in different sizes (250ml 150ml 50ml) have clear and accurate scales for you to measure liquid efficiently & accurately without any problem.
- SIGNIFICANT FEATURES: Reusable, environmental friendly, will not shatter easily, easy to clean, high temperature resistance, for laboratory, chemistry, science experiment, liquid measuring, etc.
- HIGH-END MATERIAL FOR LAB: These Borosilicate Glass Erlenmeyer Flasks have High chemical durability and low thermal expansion, which can withstand the temperature under 800 °C (~1500 °F).
- PACKAGE & WORRY-FREE: Each set has 3 Erlenmeyer Flasks & 3 Rubber Stoppers. If you received defective items, please contact us via email for full refund or replacement. We would try our best to fix issues.
Conclusion
By our suggestions above, we hope that you can found Vacuum Flask 250Ml for you.Please don’t forget to share your experience by comment in this post. Thank you!
