Test tube peg racks, filled PP.White racks. Tube size10-13 mm. Rack size: (lxwxd) 179x127x64mm Array 8×12 Suitable for sample collection tubes, reaction tubes or similar-diameter tubes. Will not float in a water bath. Can be used to dry inverted tubes. Also can be used to hold and dry electrophoresis and chromatography plates. Chemical resistant. (Autoclavable)