
Watch Glasses, Economy by United Scientific are clear soda lime glass discs 1.8 to 2.0 mm thick, with fine-ground, polished edges and a slight concavity. Twelve diameters from 25 mm to 300 mm are available, each packed 12 per pack. Chemistry teaching labs use them to cover beakers, evaporate solutions, grow crystals, and hold samples during weighing.







