... level:ABEC-1,ABEC-3,ABEC-5 2.Vibration noisy lever:Z1,Z2 3.ISO standard 4.Hot sale SKF stainless steel ... bearing Retainer:copper cage,nylon retainer,steel retainer,bakelite retainer, etcMaterial:chrome steel,stainless steel,bearing steel Suffixes:CA: Integral brass cage, ... double row asymmetrical rollers, inner ring rideCC: Two piece steel cage, double row symmetrical rollers,inner ring rideCTN1: ...