durability and strength. Bearing type is miniature single row deep groove ball bearing, mainly take radial load as well as moderate axial load. Ball bearings are equipped with two rubber dust seals to prevent the ingress of dirt, and foreign matter. Bearing features: simple configuration, high speed, high precision, lower friction coefficient, less vibration and noise, most widely used. Miniature deep groove ball bearing suitable for all kinds of industrial equipment, micro motor, rotary motor, office equipment and so on. Specification: Product Name: Deep Groove Ball Bearing Weight: 160g Model: 693RS Color: Silver Material: Carbon Steel Size: Inner Diameter: 3 mm Outer Diameter: 8 mm Thickness: 4 mm Package Contents: 200 x Deep Groove Ball Bearing Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.