... bearing 1.GCr15, GCr15SiMn, G20Cr2Ni4A 2.Precision level:P0,P4,P5,P6 3.Vibration:Z1V1,Z2V2,Z3V3 4.Good service Deep ... and noise level: Z1, Z2, Z37)Precision level: P0, P6, P5 (ABEC1, ABEC3, ABEC-5) 8)OEM Service Serves or Not ... ball brearingDouble direction thrust angular contact ball bearing SKF 22212 E bearing