... Z1,Z2 3.Stocks 4.NBR co, Series 12(K), 22(K), 13(K), 23(K) aligning ball antifriction bearing Packing&DeliverPacking Detail:Standard export ... Suffixes:CA: Integral brass cage, double row symmetrical rollers,inner ring rideMA: Integral brass cage, double row symmetrical rollers ,outer ... the taper is 1:30W33: With lubrication groove in outer ring,with three oil holesC2/C3/C4: Internal clearance series: C2 ...