LinkMejor Porcelain Crucible Cup 20ml with Lid for Foundry Melting Casting Refining

-The porcelain is uniform in thickness and dense which allows stable mechanical strength and little permeability.-Comes with a loose-fitting lid that allows gases to escape during sample heating.-Recommended for chemists, metallurgists and others involved in high temperature work demanding free results.-Good resistance to acids of all kinds, even at boiling point, with the exception of hydrofluoric acid. -The crucibles are glazed on the inside and outside surface except for the outside bottom and rim.-Porcelain crucibles should be in drying box or muffle furnace over 30 minutes and place in drying column in reserve. Specification:Material: Porcelain Max. Working Temperature: 1000CCapacity: 20mlMax. Capacity: 21mlCup Top Outer Diameter: 38mm (1.50")Cup Height: 34mm (1.34")Lid Inner Diameter: 40mm (1.57")Lid Outer Diameter: 44mm (1.73")Height (with Lid): 46mm (1.81")