Deep groove ball bearing 6301 1.low noise, competitive price 2.wide application 3.Material:Chrome steel,GCr15 4.ISO9001:2008 1.Material:Bearing steel, GCr15,9Cr18, Chrome ... :20083.Precision standard:ABEC-14.Vibration level:Z1, Z2, Z35.Shield type: Open, Z, ZZ, RS, 2RS6.Feature:Low noise,good quality,suitable for high ...