
United Scientific® Plastic Test Tube Rack, Cube by United Scientific is a one-piece molded polypropylene rack with four usable sides that hold tubes from 12 mm through 25 mm in diameter, giving 88 spaces in total. Turning the cube puts the right hole size on top, so one 8" x 4" x 4.5" rack covers several tube sizes. Used in teaching, microbiology and general research labs.