Float Microtube Rack, Square, 16 Places, 3.75" x 3.75" x 3", White, 4/pk (456395)Autoclavable polypropylene construction for strength, buoyancy and termperature resistance. Racks float with full load of filled tubes. Molded handle in center of rack for comfort and support during transport. Legs allow rack to stand upright for use on benchtop. use in ice, waterbaths or on the benchtop. 65mm round rack fits most 400mL beakers. Commonly found in cloning, microbiology and immunology labs.