Ideal for processing biohazardous materials that require autoclaving prior to disposal. Available with or without temperature indicator. High-integrity polypropylene bags withstand 135C (275F) maximum autoclave temperature. Double-thick bags are ideal for sterilising animal cages and other objects with sharp corners. Twist-tie closure allows bag to expand and vent steam during coolingBags resist punctures, tears, and leaks and meet the 165g dart drop standard performed as required by ASTM D1709-98Each bag is imprinted with the universal biohazard symbolAll Biohazard bags have a temperature indicator patch with the words " CONTENTS HAVE BEEN AUTOCLAVED " printed in a chemically active ink. Before autoclaving the ink is clear on a white background, after autoclaving is complete, it darkens and words appear in a dark brown colour, providing proof that bag has been exposed to high temperatures for sterilisation. PP, 50 m thick, yellow