Screw thread tamper evident microtubes

Microtubes and caps are made of autoclavable ultra clear polypropylene.
Ribbed cap with internal silicone O-ring for a positive leakproof seal.
Resistance to centrifugation: 17,000 xg.
Microtube dimensions: 11 x 44 mm.
Cap dimensions (with tamper-evident ring): 15 x 9 mm