Young4us Watch Glass Beaker Cover Set, 6 Pcs Lab Watch Glasses in 150mm, 100mm, 70mm for Laboratory, Science and Chemical Experiment (150 mm x 2, 100 mm x 2, 70 mm x 2): Amazon.com: Industrial & Scientific
Watch glasses DURAN®, 250 mm | Crystallisation dishes and watch glasses | Dishes, evaporating dishes and mortars | Laboratory Glass, Vessels, Consumables | Labware | Carl Roth - International