1.Silicone seal ring. 2.Best quality. 3.Water&air proof, & durable. 4.Any colors available. 5.Customized is welcome. Flat Sealing Rings1:You could oder seal rings from us with different materials,like rubber ,silicone,plastic.2:Oil,air,water and other liquids cannot be leaked with our silicone seal rings.3:Any size,thickness,color,type of ring gaskets we can make for you.4:We could make any Jar's ...