... groove ball bearing: 1.Material: chrome steel. 2.Noise Level Z1,Z2,Z3,Z4 3,GCR 15 GCR11 4.Certificate: ... ,flanged,extended inner ringApplication: Remote-controlled cars,bicycles,sk...Vibration level codes: V4, V3, V2, V1Internal clearance codes: C0,C2, ... Retainer: PTFE, Nylon, PEEK Or Stainless SteelLubrication: Oil,grease,dryNoise Level: Z1,Z2,Z3,Z4Type: Deep groove ball bearingPackage: Tube & Box ...