Autoclavable centrifuge tube boxes provide a more durable and rugged alternative to cardboard or foam racks. These racks can withstand a temperature of -90° C to 121° C. Color-coding makes it easy to distinguish between rack sizes - green racks hold 15ml tubes, and blue racks hold 50ml tubes. Each tube placeholder contains a numeric code, easily visible through the clear lid. Additional Info: Centrifuge Rack, Pp, 16 Place, Holds 50ml Tubes, Pk/4 Package Size(L x W x H): 12 X 12 X 6 (IN) Categories: Centrifuge Ware, Tubes HTS Code: 3926.90.9910 UNSPSC: 4.11228e+007 Country Of Origin: INDIA