Beakers, Beaker Covers, Watch Glass Covers, Pyrex® Glass, Corning®

PYREX Watch Glass/Beaker Covers
Ribbed Watch Glass/Beaker Covers
Designed for use as a beaker cover. Ribs are molded into the glass so that they can’t pop off as they do when cane is sealed to standard watch glasses. Permits reflux of digestate and escape of excess vapor. Eliminates risk of contamination from dropped hooks or props. Meets EPA requirements for methods 3005, 3010, and 3020.

Plain Watch Glass/Beaker Covers
These 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.