1.High quality bearing 2.high precision, 3.low noise, long-life 4.excellent reliability. 5.nunning smoothly Model NO. : R608RSbearing rollerBearing material:carbon,chrome,stailess steelRoller material:nylon or POM, nylon,glass fiber,etc Type: 2RS ZZ ,Z ,RS,OPENOEM and non-standard bearing&roller orders are available .Sealing from: With one or two side rubber seal: RS, 2RS; With one or two side ...