Pyrex Borosilicate Glass Class B Flat Bottom Economy Volumetric Flasks with Glass Standard Taper Stopper, 500ml Capacity (Case of 12)

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Price: $487.02    

Product Description

These 500mL PYREX economy flasks are designed for those that do not require the precision accuracy of our Class A capacity flasks. Capacity tolerances are twice those specified for Class A volumetric ware. The graduation line is sharp and permanent; large white block letters make inscriptions easy to read. Supplied with No. 19 Standard Taper glass stoppers. For replacement stoppers see No. 7650.

Pyrex Borosilicate Glass Class B Flat Bottom Economy Volumetric Flasks with Glass Standard Taper Stopper, 500ml Capacity (Case of 12) Review

It's good glass, and the stopper fits well.
The line on the neck is scribed rather than painted, making it additionally prone to breaking there. The glass is thin-walled so this is a rather dangerous idea. There's a lot of torque on that point when these are full.

I purchased these b-grades for about $15 a piece. The price of $70+ at the time of writing is a complete rip for this grade of flask.

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