About this item
PYREX® borosilicate glass.
- High chemical durability
- Prevents contamination of solutions
These watch glasses are molded to the same radius of curvature for convenient stacking. The heavy wall and uniform fire-polished edge provides the mechanical strength. The outside diameter cannot be controlled within close limits and a slight degree of out-of-round can be expected.
They are also used as covers for heated beakers.
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