... ,White 3.competitive price 4.OEM is welcome Rubber o ring1.Materials advice: rubber (EPDM, also NBR, SBR, CR, NR, etc),as ... ,red, blue,any in PMS,Especially for the silicone products.7.Hardness:30 to 90 shore A or IRHD, tolerance can ... PP bag inside, strength carton outside, or as your request. Rubber o ring KSH0706