Product Name: Deep Groove Ball Bearing Model: 608Z Material: Bearing Steel Outer Diameter: 22mm Inner Diameter: 8mm Closed with 2 shields to protect the bearing from dust or any possible contamination. Commonly used for electric motors, wheel bearings, agriculture, transportation and much more. Thickness: 7mm Main Color: Silver Weight: 417g Package Contents: 36x 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.