In polystyrene (PS), graduated, sterile. The particularly shaped polyethylene (HDPE) dualpositions cap ensures, with a light touch, a good aeration of the sample (aerobic cultures) and, with a stronger pressure, to obtain a leakproof closure (anaerobic cultures). Non-cytotoxic, biologically inert. RCF max = 3,000 g. Ø 12 x 75 mm. Resistant to temperatures from -20 °C to +70 °C.