A very sturdy one-piece molded polypropylene rack. All four sides can be used interchangeable for 12mm through 25mm diameter tubes. Rack features a total of 88 spaces on its four sides. Shipping weight: 0.75 lbs.; Dimensions: 8" x 4" x 4.5". Additional Info: Plastic Test Tube Rack, Cube Package Size(L x W x H): 8 X 4.5 X 4 (IN) Categories: Racks, Test Tube HTS Code: 3926.90.9910 UNSPSC: 4.11228e+007 Country Of Origin: INDIA