Featured is a 5 inch (125mm) watch glass. They are each priced separately, but we do offer quantity discounts. These watch glasses are made of heavy wall soda lime plate glass with fire-polished edges.   They are concave, clear, and annealed  Â
Watch glasses are useful in any laboratory and can be used to cover beakers or flasks, reducing evaporation of volatile liquids or solids during sample preparation. These are often used to observe crystal formations in chemical solutions.
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