Premium MaterialThe flat seal o-ring sets are made of excellent rubber and fiber material, wear-resistant, having good aging resistance and air tightness, durable and long service life.Easy to UseThe flat rubber gasket prevents pressure, corrosion between two objects, and the natural expansion and contraction of pipes and leaks. The washers are used as fasteners and also serve as spacers. You can put some lubricating oil on your lips to make installation easier.Easy to StoreAll sealing ring assortments come in a transparent storage box, subdivided and labeled, convenient for storage and order picking. You can save yourself the hassle of storing and choosing sizes.Wide Range of ApplicationsIdeal for plumbing, automotive, mechanical engineering, air conditioning distributors, chemical pipelines, cylinders, appliances, bearings, pumps, pulleys, etc.What You GetYou get 141 pieces rubber sanitary gaskets in 18 popular sizes. It includes three types: rubber washers, fiber washers and EVA washers. The sealing rings are small, delicate and strictly functional.