1.good quality 2.excellent running properties 3.low noise 4.long ... .Bearing Material:carbon,chrome,stainless steel,iron,copper ect.2.Roller Material:POM,nylon,glass fiber,etc3.OEM and ... -life and excellent reliablity is our product’s feature. 2.Our hot sales product :60 series,69 series,62series ... rollers for you reference,don’t need to open new mould.2. We can adjustment the price according to your ...