Sevearl materials for flat seal, waterpump seal oil seal, o-ring : NBR, ACM, FPM, HNBR elastomer can shoose on your requirement - Type of ball bearing seal D,R,DH,DA,DY,U - type also can make on your demand. - Types of waterpump seal ans oil can make on your type. - optional colout for your products of the flat seal, waterpump seal, oil seal and o-ring : black , red, brown, green can make it on your order. - Subsidiary products : Hydraulic-pressure & Injection moduling products for electronic