Made from Acetal Polymer. These biopsy cassettes can hold up to six tissue specimens, each one placed in it’s own compartment, numbered from 1 to 6 and measuring 7 x 12 x 5 mm (1/4 x 7/16 x 3/16"). Cover and base have over 3000 0.36 mm square openings. Cassettes keep specimen safely submerged in solvent and are totally resistant to the most histological solvents. The efficient flow-through slots maximize fluid exchange and insure proper drainage. The one-piece integral lid eliminates the need for separate steel lids. Large labeling areas are located on three sides of the cassette. The anterior writing area is at a 45° angle, making the cassette, to some degree, able to be used with certain types of cassette labeling instruments. Each case contains 4 dispenser boxes of 250 cassettes with covers assembled.