1.High quality,favorable price 2.ABEC-3,5;Z2V2,Z3V3 3. ... roller bearing.3.material: stainless steel,bearing steel, carbon steel,high chrome4.precision: P0,P2,P4,P5,P65.tolerance grade:GB ... : d 15-----800mmThe size of single row .full complement cylindrical roller Bearings: d 20---1120mmDouble row .full complement cylindrical roller bearing:d 20 ...