linear bearing 1.Chrome steel/GCr15/stainless steel 2.ISO9001:2000 3.Accuracy:P0,P6,P5.P4 4.Accept EOM linear bearing1 ... ,PS2, Alvania R12 and so on Series1.Deep groove ball bearing: 6000series, 6200series, 6300series, 6400 series, 6800 series, 6900 ... , UCP series, UCF series, UCFL series7.Self aligning ball bearing: 1200series, 1300series, 2200series, 2300series Ring MaterialChrome Steel ,Carbon ...