... : chrome steel. 2.Noise Level Z1,Z2,Z3,Z4 3,GCR 15 GCR11 4.Certificate: TS16949. Deep groove ball bearingDeep groove ball bearing ... : PTFE, Nylon, PEEK Or Stainless Steel8.Bore Size:from 1mm to 300mm9.Outside Diameter:from 3mm to 500mm Structure: Deep ... : Oil,grease,dryNoise Level: Z1,Z2,Z3,Z4Type: Deep groove ball bearingPackage: Tube & Box Packaging & DeliveryPackaging Detail:Tube & BoxDelivery ...