These polyproylene racks can conveniently hold inverted tubes for drying and minimize collection or airborne contaminants. Racks can also be used to hold and dry electrophoresis and chromatography plates. Auto clavable. The 50 place rack features an 5 x 10 array of pegs that hold test tubes up to 16mm in diameter. Additional Info: Test Tube Drying Racks, Plastic, 50 Places, Pk/6 Package Size(L x W x H): 5 X 8 X 11 (IN) Categories: Racks, Test Tube HTS Code: 3926.90.9910 UNSPSC: 4.11228e+007 Country Of Origin: INDIA