Rubber o ring 1.Material:Rubber 2.Color:Black,White 3.competitive price 4.OEM is welcome Rubber o ring1. ... you optimized material performance in your particular application.2.Application:automotive, machinery, bathroom facilities,medical, household ... usually in 7daysFor mass production mold, usually in1- 2 weeks6.Color: black, transparent,red, blue,any ... or as your request. Rubber o ring KSH0706