... .Sealing from:2RS ZZ ,Z ,RS,OPEN (metal or nylon)5.Colour: natural color, green, orange,pink, blue, grey, milky white ... 5. with high load-bearing apacity6.excellent rustproof propertiesCraft Details:1 Heat treatment2 Grinding machines3 Cleaning4 Rust prevention5 PackingAbout us1. Professional supplier ...