Double row angular contact ball bearing 1.ISO9001 manufacturer agent 2.100% DIN Standard. 3.Reliable quality Double row angular contact ball bearings,please read IXIN pdf for exact selection.1.Shield / closure: open,ZZ, 2RS2.Tolerance codes: P0,P63.Bearings material: GCr15,100Cr6,JIS24.Retainer: PTFE, nylon, steel5.Hardness for rings and balls: 59 - 63HRC Double row angular contact ball bearings ...