Our user friendly cube rack is a must for any laboratory. Slide these polypropylene racks together in multiple orientations—work with different sized tubes at the same time. Accommodates (4) 50mL tubes, (10) 15mL conical tubes, (12) 12 x 75 or 12 x 100 tubes, or (16) 1.5 to 2.0mL microcentrifuge tubes. Autoclavable. Available in natural, blue, pink, yellow, or assorted colors (one each of blue, green, yellow, orange, and pink). Rack measures 4 1/4 x 4 1/4 x 4 1/2". Packs of 5