Features: 1.Corrosion resistance: can withstand almost all chemical solvents (resistant to strong acid, strong alkali, aqua regia and various organic solvents). 2.High temperature resistance: the use temperature up to 250 , the short-term resistance of the heating plate can be 300 degrees. 3.Low temperature resistance: -196 can maintain 5% elongation. 4.Weather resistance: better aging life of plastic. 5.High lubrication: low friction coefficient in solid materials. 6.Non-adhesion: the surface tension is small, and no substance is adhered. specification:Item Type: Laboratory Crucible Optional Capacity: 30ml, 50ml Size: 30ml: 5.3x4.5cm / 2.09x1.77 in 50ml: 5.4x5.1cm / 2.13x2.01 in PackageList:1 xLaboratory Crucible with Cover NoteIt needs to be used on asbestos net, not directly exposed to open flame, for digesting samples, catching acid, boiling, steaming, etc.