Specialties of products We manufacture precision high quality rubber seals in various diameters which widely used in mechanical instruments, hydraulic, pneumatic systems & construction automatic. Lots of Standards (such as AS568, JIS B2401, BS1506? series o rings are available. And welcome to custom non-standard O-rings, OEM pricing and RoHS compliance. Selected Materials Buna-N, Viton? Silicone, EPDM, Neoprene, Natural Rubber, Polyurethane, Fluorosilicone, HNBR, ACM and other special rubber material are available.