4 Neck Round Bottom Flask
Product Code : EL-GF-10196
Quick answer: The 4 Neck Round Bottom Flask has a centre neck and three parallel side necks with interchangeable joints, made from heat-resistant, low-expansion glass, available in 50ml to 2000ml capacities with a choice of centre and side socket sizes.
| Specification | Detail |
|---|---|
| Capacities | 50ml, 100ml, 250ml, 500ml, 1000ml, 2000ml |
| Centre socket sizes | 19/26, 24/29, 29/32, 34/35, 45/40 |
| Side socket sizes | 14/23, 19/26, 24/29 |
| Neck configuration | Centre neck plus three parallel side necks, interchangeable joints |
Four Fitting Points for Complex Reactions
Where a reaction needs more simultaneous connections than a 2 or 3 neck flask can offer — for example a stirrer, thermometer, addition funnel and reflux condenser all at once — this 4 neck flask's centre neck plus three parallel side necks provide that capacity. Interchangeable joints across the necks mean stoppers, adaptors and fittings can be moved between positions as the set-up changes.
Frequently Asked Questions
How many fitting points does the 4 Neck Round Bottom Flask have?
It has a centre neck plus three parallel side necks, for four fitting points in total.
What socket sizes are available?
Centre socket sizes of 19/26, 24/29, 29/32, 34/35 and 45/40 are available, with side socket sizes of 14/23, 19/26 and 24/29.
What does "interchangeable joints" mean for this flask?
It means stoppers, adaptors and other fittings with matching joint sizes can be moved between the different neck positions as the reaction set-up requires.
Related Products
Explore more multi-neck flasks in the Glass Flask range, including 3 Neck Round Bottom Flask and 2 Neck Round Bottom Flask.
Request a Quote
Contact Us for a quotation, or visit the Tenders page for bulk and institutional procurement.
Last updated: September 2026.
.jpg)
 (1).png)