Control inventories, shorten assembly times, and minimize parts handling. Heavy-duty bins securely stack atop each other, or sit on shelving. Molded of high-density polypropylene, unaffected by weak acids and alkalis. Sturdy, one-piece construction is water, rust, and corrosion-proof. Guaranteed not to crack or break under normal load conditions as stated in our 1-year limited warranty. Autoclavable up to 250° F.