... Accept custom-made 3.Grade:P0.P3.P4.P5.P6 v groove ball bearingGreese/OilAs you requirement, such as SRL ... bearing: N series, NU series, NJ series, etc6.Pillow block bearing: UC series, UCP series, UCF series, UCFL series7 ... bearing: 1200series, 1300series, 2200series, 2300series Ring MaterialChrome Steel ,Carbon steel,Stainless steel,CeramicTolerance gradeGB/T307.1-205ID Size5mm~1500mmPrecision P0,P3 ...