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Watch glasses for heating solids and liquids as well as for use as beaker covers are available at VWR. Select models constructed of borosilicate, soda lime, or flint glass. Ribbed watch glasses for use as beaker covers eliminate vapor escape. Products have fire polished edging and are moulded to the same radius for easier stacking. Select watch glasses in the appropriate diameter to meet your needs and purchase in packs or cases.