Bearings reduce friction by providing smooth metal balls or rollers and a smooth inner and outer metal surface for the balls to roll against.
These balls or rollers "bear" the load, allowing the device to spin smoothly.
Size: 7 x 19 x 6mm(Inner Diameter x Outer Diameter x Thickness)
1 x Miniature small bearings
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 +/- 1-3cm.