... ,extinguishers ,Refrigeration Compressor in air conditioning, etc.3. Main products: O-Ring.X-Ring V-Ring.R-Ring. Y-Ring ... oil seals , rubber flat washers, rubber Circles, Gaskets, engine parts and accessories,compression mold , etc. 4. Certification:ISO9002:2009, TS16949 , ... size9. Different sizes and color can be make on your requirement ,but o-ring's mold fee is free. rubber products and accessories