1.Silicone seal ring. 2.Best quality. 3.Water&air proof, & durable. 4. ... . 5.Customized is welcome. Flat Sealing Rings1:You could oder seal rings from us with different materials,like rubber ,silicone,plastic ... ,water and other liquids cannot be leaked with our silicone seal rings.3:Any size,thickness,color,type of ring gaskets ... we can fulfill with.6:Available with ODM and OEM services.