Amber Volumetric Flask, With PE Stopper Class-A
Product Code : EL-VF-10260
Quick answer: This is a Class-A tolerance amber borosilicate volumetric flask with a polyethylene (PE) stopper, supplied across 13 capacity/neck-size combinations from 5ml to 2000ml with tolerances tightening from ±0.6ml down to ±0.04ml.
| Capacity (ml) | Neck Size (N/S) | Tolerance (±ml) |
|---|---|---|
| 5 | 10/19 | 0.040 |
| 10 | 10/19 | 0.040 |
| 20 | 10/19 | 0.040 |
| 25 | 10/19 | 0.040 |
| 50 | 12/21 | 0.060 |
| 50 | 14/23 | 0.100 |
| 100 | 12/21 | 0.100 |
| 100 | 14/23 | 0.100 |
| 200 | 14/23 | 0.150 |
| 250 | 14/23 | 0.150 |
| 500 | 19/26 | 0.250 |
| 1000 | 24/29 | 0.400 |
| 2000 | 29/32 | 0.600 |
Reading the Neck Size Against Capacity
The neck size (N/S) column is the standard ground-joint reference for each flask, and it is what determines which stopper and interchangeable-joint accessories will fit — note that the 50ml and 100ml capacities are each available in two neck sizes, so buyers standardising on a single stopper size across their glassware should confirm which N/S variant they are ordering. Tolerance widens steadily with capacity, from ±0.04ml at the 5-25ml sizes up to ±0.6ml at 2000ml, consistent with the way volumetric accuracy is specified across the Class-A range generally.
Frequently Asked Questions
What stopper does this flask use?
It uses a polyethylene (PE) stopper.
Why are two neck sizes listed for the 50ml and 100ml capacities?
These capacities are offered in two neck-size variants; buyers should confirm which N/S size matches their existing stoppers or accessories.
What is the tolerance at the largest capacity?
The 2000ml flask carries a tolerance of ±0.6ml.
Related Products
Explore more from the Volumetric Flasks range, including Amber Volumetric Flasks, Class-A and Amber Volumetric Flask, Serialized, With Penny Head Stopper Class A.
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Last updated: September 2026.