Made of autoclavable (121 ºC) transparent polypropylene or polystyrene. Green cap made of high density polyethylene. Dimensions: 15 x 102 mm. The external skirt allows the tubes to remain free-standing. Supplied screwed. Recommended volume: 12 ml. The sterile model (ethylene oxide) is supplied individually in flow-pack bag, with indication of batch, expiration date, etc. According to the guidelines for sterile products. Resistance to centrifugation: PS: 7,500 xg. PP: 15,000 xg. Attention: For autoclaving, the cap should be loose on the thread and not tightly fitted.