Beaker Covers

Photo of Corning 9985 PYREX® Plain Watch Glass Beaker Covers

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.

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Photo of WSI 110 Watch Glass Beaker Covers

These concave clear annealed watch glass covers can be used to return condensation to beakers. Fire polished edges.

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Photo of Corning 9990 PYREX® Ribbed Watch Glass Beaker Covers

These ribbed PYREX® watch glasses are 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 escape of excess vapor and eliminates risk of contamination from dropped hooks or props. Meets EPA requirements for methods 3005, 3010, and 3020.

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