Corning® Pyrex® Watch Glasses / Beaker Covers
By Corning
These PYREX® watch glasses possess high chemical durability, thus preventing contamination of solutions. They are molded to the same radius of curvature for convenient stacking. The heavy wall and uniform fire-polished edge provide mechanical strength. The outside diameter cannot be controlled within close limits and a slight degree of out-of-round can be expected to occur. Can also be used as beaker covers.