Needle bearing 1.ISO9001:2000 2.Guaranteed quantity 3.Prompt delivery 4.Long life low noise needle bearingWe are manufactuer and we are also ... 2. Materials: GCr15, GCr15SiMn, G20Cr2Ni4A etc Ring and cages: Chrome bearing steel Balls: Chrome steel or carbon structural steel Cover: Rubber ... , P6, P6x, P5, SP, P4, UP (ABEC1, ABEC3, ABEC5); 5. Noise Level: Z1, Z2, Z3; 6. Vibration Level: V1, V2, V3 ...