Porous-bottom crucibles have a molded-in porous disc with stable porosity and consistent flow rate. Available with very fine (1.2 µm), fine (5 µm), and medium (15 µm) pore diameters. Glazed inside and out, except for outside bottom and rim. Autoclavable. Additional Info: Crucibles, Porous Bottom, Porcelain, 25ml, 15.0 Dia Package Size(L x W x H): 6 X 10 X 12 (IN) Categories: Crucibles, Porcelain HTS Code: 6909.11.4000 UNSPSC: 4.11222e+007 Country Of Origin: INDIA