Metal-Free Centrifuge Tubes: Common trace metals are kept below an ICP-MS detection level of One part per Million (PPM); Max. RCF up to 20,000 x g, work well for any high-density gradient separation; Manufactured from virgin ultra clear USP Class VI PP; Leak-proof at -95kPa (14psi); With natural colorant-free flat caps.; DNase/RNase-free;Non-pyrogenic<0.125EU/mL; Freezable Temperature: -80°C.

Feature & Performance: Manufactured from virgin ultra clear polypropylene, Leak-proof at -95kPa (14psi), Maximum accuracy of graduations at±2%, DNase/RNase-free;Non-pyrogenic<0.125EU/mL

Feature & Performance: Manufactured from virgin crystal polystyrene, all materials are non-cytotoxic. Tray pack assures higher protection，Reduces bottle scratches due to transport and maintains greater clarity

Feature & Performance: Runlan Culture tube, Round bottom, with Dual-position cap, Rimed, with graduation. Vented for aerobic cultures work, or sealed for anaerobic cultures work.