These rugged autoclavable storage boxes are molded in polycarbonate, and can be used at temperatures of -150°C to +121°C. Designed to hold 100 each 0.5ml microcentrifuge tubes, or 64 each 1.5ml tubes. The numbered grid on transparent lid is keyed in one position to prevent misalignment. Lid accepts writing with a marker. Not recommended for use with liquid-phase liquid nitrogen. Dimensions 5 1/4" x 5 1/4" x 2" (133 x 133 x 52mm). Additional Info: Microcentrifuge Tube Storage Boxes, Pc, 0.5ml Package Size(L x W x H): 9 X 6 X 6 (IN) Categories: Centrifuge Ware, Tubes HTS Code: 3926.90.9910 UNSPSC: 4.11217e+007 Country Of Origin: INDIA