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Volumetric flasks, 100 ml class a pyrex, case of 6
Pyrex  Class A Lifetime Red  Volumetric Flasks
A new box of six top-quality Pyrex  flasks. Includes the original sealed bag of six new Corning/Pyrex  #13 barrel stoppers. Only one flask is shown for better detail, however the listing is for 6 brand new flasks. All marks seen on the glass are from the camera flash.
Possibly the best volumetric flask available: The machine-blown bodies are attached to heavy-tubing, heavy-bead necks for additional strength. These feature clear graduation lines and strict Class A tolerance. Also, Pyrex  glassware is generally regarded as one of the most, if not the most, heat-resistant, durable, and well-constructed of the borosilicate brands. Finally, there is a deep red, contrasting, permanent red band that, when coupled with the sharp fill line, allows for improved viewing and accuracy.
$250-$270 for a pack of 6 (Large supply houses)