OAK RIDGE TUBES PTFE/FEP WITH ETFE SCREW CAP 30ML PK 2PTFE and FEP, round bottom centrifuge tubes from Thermo Scientific Nalgene are autoclavable and are supplied with a non contaminating, linerless, ETFE screw cap which is leakproof during ordinary use outside the centrifuge. For speeds up to 50000xg. Important Warning Sterilising Tubes Some tubes where indicated can be sterilised by autoclaving. However BEFORE AUTOCLAVING (or sterilising by gas or dry heat) the cap or closure must either be removed or