These trays exhibit very high corrosion-resistance to acidic, alkaline and saline solutions. Satisfactory for service at temperatures up to 250° F and can be sterilized. Not recommended for near-freezing temperatures. The polypropylene construction has high tensile strength and tremendous impact strength. There is virtually no water absorption. Smooth corners with special "skid-proof" textured surface to resist sliding of contained material. NSF listed.