About this item [Size] - FR8-2RS ABEC-3 bearing (I.D.=1/2", O.D.=1-1/8", Thickness=5/16", Flange Dia:31.1mm). [Durable] - Chrome Steel (GCr15) races offer high hardness and great wear resistance, thus extend bearings' service life. [Easy to Maintain] - Shields on Both sides to keep lubricant in. Z1 noise level for most general use.
[Note] - Keep the bearing working environment clean and bearing lubricated in time.
Material: Alloy Steel Item dimensions L x W x H: 3.94 x 1.97 x 0.79 inches Bearing Number: FR8 Item Thickness: 0.31 inches Item Dimensions: 3.94 x 1.97 x 0.79 inches