Borosilicate Glass Watch Glass with Polished Edges, 12-Pack

This pack of 12 watch glasses each measures 2 inches (5cm) in diameter with a 2.0mm thick construction that resists shattering. The concave dishes feature ground edges and polished surfaces for safe handling. Watch glasses serve multiple laboratory functions including covering beakers and flasks, holding small samples for low-power microscope observation, evaporating liquids from samples (e.g. growing seed crystals), and forming lenses of ice or other liquids. Suitable for science classrooms and professional laboratories.