These translucent polypropylene bags are 0.0015” thick and can be used for the safe disposal of used pipettes, petri dishes, culture plates, membrane filters and more. The polypropylene allows you to autoclave at temperatures up to 135°C (275°F) resulting in 50% faster cycle times compared to high-density polyethylene bags. Printed bags have the standard biohazard warning symbol and a sterilization patch that darkens when subjected to steam sterilization.