... oil resistant, long service time. 1.Specifications Product NameBlue Ring MaterialPU Size42-52-4mm ProfileOne side is round, the other ... PriceAccording to the quantity and detailed request. CertificationISO9001:2000 PackingBy plastic bags and cartons, or as customer's requirement. LogoTL, ... a professional manufacturer of making all kinds of PU ring, we have our own team of researching, developing ...