Thick-Wall Construction for High-Speed Operation Leakproof Available in Earth Friendly? Recyclable Racks RNase-, DNase-, and Endotoxin-Free These popular conical-bottom centrifuge tubes are made of ultra-clear polypropylene copolymer. They feature printed graduations and smooth inner walls for easy filling and sample preparation. Printed writing area on side allows for permanent coding. Autoclavable at 122?C (251.6?F). Freezable to -90?C (-130?F).
Caps are flat, with a smooth surface for additional labeling options All caps are made of high density polyethylene and are autoclavable. Caps must be loosely attached to tubes when autoclaving.