Various types , colors and materials are available; Good quality, reasonable price Rubber jacket1, Terials: NBR, silione, NR, FKM, etc2, Various types and color are available3, The sealing property is good4, Good quality with competitive priceRubber gel1, Terials: NBR, silione, NR, FKM, etc2, Types of O-ring, E-type, U-type, etc, can make on your size.3, Different sizes of Oil Seal, Rubber Seal, ...