Molded from a special high-density polymer, these cassettes keep specimens safely submerged in liquid and are totally resistant to the chemical action of histological solvents. The efficient flow-through slots maximize fluid exchange and ensure proper drainage. The one-piece integral lid eliminates the need for separate steel lids. The snap latch and hinge-lock design of the UNISETTE™ prevent early separation of base and lid and allows for one-hand operation. Lids can be opened and closed as often as necessary and they always relock securely without danger of specimen loss. Anterior writing area is at a 35° angle. Available in non-cytotoxic, non-metallic colors. Made of acetal.