Optimize your storage space. Control inventories, shorten assembly times and minimize parts handling. Heavy-duty polypropylene bins hang from racks, panels, rails, and carts; securely stack atop each other and sit on shelving. These are unaffected by weak acids and alkalis. Sturdy, one-piece construction is water, rust and corrosion proof and guaranteed not to break. Autoclavable up to 250°F.