4pcs 8x30x8.5mm Ball Bearing Machine Guide Pulley Roller Double Shielded GCr15
Chrome Steel BearingsProduct Details1.Chromium Steel long-life bearings, smooth and low noise2.bearings are shielded on both sides to keep lubricant in3.(I.D.=8mm, O.D.=30mm, Thickness=8.5mm)4.ABEC Tolerance 1 (P0), Z2 Noise Level for most general use5.Suitable for all kinds of industrial equipment, micro motor, small rotary motor, office equipment and so on.