... 3,End cover:ZZ,RS 4,Noise level:Z1,Z2 Quick Details Structure: Deep GrooveType: BallBrand Name: HCCCBore Size: 5 - 100 ... bearingsPrecision Rating: ABEC-1, ABEC-3, ABEC-5, ABEC-7Seals Type: Open,Teflon Sealed,Rubber SealsNumber of Row: Single RowPlace of ... information please contact us. SSR20 High Quality linear bearing Box-type SBR20 linear motion bearings SBR16