... and Noise level: Z1, Z2, Z3. ZV2, ZV3, Z2V2, Z3V3 NINGBO CANNAR IMP.&EXP. CO.,LTD is a manufacturer of ball bearings ... in Deep Groove Ball Bearings ,Spherical Roller Bearings, Needle Roller Bearings,Tapered Roller Bearings, Automotive Bearings, Pillow blocks, Thrust Ball Bearings,and also dealing in ... closure: open bearing, Z, ZZ, RS, 2RS.5) Vibration and Noise level: Z1, Z2, Z3. ZV2, ZV3, Z2V2, ...