Features:
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.

Specifications:
MR104-ZZ
Size: 4x 10 x 4mm（Inner Diameter x Outer Diameter x Thickness）

Package Included:
10 x Bearings