Round Bottom Flask, Narrow Neck
Product Code : EL-GF-10169
Quick answer: The Round Bottom Flask, Narrow Neck is a borosilicate glass flask with a narrow neck and rim, suited to heating and distillation set-ups where an even heat distribution matters, with a base diameter of 166mm, neck diameter of 50mm and overall height of 260mm.
| Specification | Detail |
|---|---|
| Material | Borosilicate glass |
| Base diameter | 166mm |
| Neck diameter | 50mm |
| Height | 260mm |
| Neck type | Narrow, with rim |
Why a Round Bottom for Heating Applications
A round-bottom shape has no flat base, which allows heat from a mantle or bath to spread more evenly around the flask than a flat-bottom design would, reducing localized stress on the glass during heating or reflux. The narrow neck with a finished rim on this flask suits fitting a single stopper, condenser or thermometer for reflux and distillation set-ups.
Frequently Asked Questions
What are the dimensions of this flask?
It has a base diameter of 166mm, a neck diameter of 50mm and an overall height of 260mm.
Why choose a round-bottom design for heating?
A round-bottom shape allows more even heat distribution around the flask than a flat-bottom design, which suits sustained heating and reflux.
What is the flask made of?
It is made of borosilicate glass with a narrow neck and finished rim.
Related Products
Explore more from the Glass Flask range, including Round Bottom Flask, Wide Neck and Round Bottom Flasks Boiling.
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Last updated: September 2026.
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