Volumetric Flasks Clear Glass with PE Stopper Class-B
Product Code : EL-VF-10276
Quick answer: This is a Class-B tolerance clear borosilicate volumetric flask with a polyethylene (PE) stopper, supplied across 13 capacity/neck-size combinations from 5ml to 2000ml, with tolerances roughly double the equivalent Class-A flask at every capacity.
| Capacity (ml) | Neck Size (N/S) | Tolerance (±ml) |
|---|---|---|
| 5 | 10/19 | 0.080 |
| 10 | 10/19 | 0.080 |
| 20 | 10/19 | 0.080 |
| 25 | 10/19 | 0.080 |
| 50 | 12/21 | 0.120 |
| 50 | 14/23 | 0.200 |
| 100 | 12/21 | 0.200 |
| 100 | 14/23 | 0.200 |
| 200 | 14/23 | 0.300 |
| 250 | 14/23 | 0.300 |
| 500 | 19/26 | 0.500 |
| 1000 | 24/29 | 0.800 |
| 2000 | 29/32 | 1.200 |
Class-B Tolerance at the Same Neck Sizes as Class-A
This clear-glass flask uses the same neck-size (N/S) structure as its amber Class-A counterpart, which means accessories and stoppers are interchangeable between the two, but the Class-B tolerance is roughly double the Class-A figure at every matching capacity — for example ±1.2ml at 2000ml here against ±0.6ml on the Class-A equivalent. Class-B suits routine mixing, dilution and teaching-lab use where the tighter Class-A tolerance is not required.
Frequently Asked Questions
How does this compare to the Class-A version?
It uses the same neck-size structure but with roughly double the tolerance at each capacity, since Class-B is the standard (wider) tolerance class.
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; confirm which N/S size matches your existing stoppers or accessories.
Related Products
Explore more from the Volumetric Flasks range, including Amber Volumetric Flask, With PE Stopper Class-A and Volumetric Flasks Clear Glass With Hollow Glass Stopper Class-B.
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Last updated: September 2026.
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