Bags are 1.5 mils thick and are made from virgin-grade polypropylene to meet or exceed the Dart Impact Resistance Test requirement of 165 grams per ASTM D1709-98. Bags are translucent with a sterilization indicator patch. The pre-printed sterilization indicator patch darkens when bag is autoclaved. Bags can be autoclaved at 135°C (275°F). The bags are labeled with the standard biohazard warning symbol and precautionary protocols in four langauges: English, French, German and Spanish. 100 bags per box.