Material -- Heavy Duty silicone Washers are made of quality silicone material, which have smooth outside, oxidation resistance and wear resistance, light weight and good insulation can ensure a long time using in bad environment like cold weather, and high humidity areas. This product comes with 10 pieces of Silicone Rubber Gaskets, Size refers to ID x OD x H. Hard material, high strength, not easy to damage, not easy to aging; Design -- Heavy Duty silicone Washers are mainly used to reduces friction between the fasteners, keep from leakage, isolates, keep from loosening or dispersion pressure. flat washers are perfect for household and commercial appliances, electrical connections, home repair, automotive repair, machine appliances, marine, and other vehicle uses. The washer spacer is an indispensable accessory for daily use and work