Miniature Sealed Metal Shielded Metric Radial Bearing Model: MR52-ZZ 2X5x25Mmm12k _x000D_ Miniature Sealed Metal Shielded Metric Radial Bearing Model: MR52-ZZ 2X5x2.5Mmm12k _x000D_ _x000D_ _x000D_ Model: MR52-ZZ_x000D_ Size:2 x 5 x 2.5mm/0.08 x 0.2 x 0.09inch_x000D_ The bearings reduce friction, provide smooth metal balls or rollers and a smooth inner and outer metal surface for rolling the balls. These balls or rollers "carry" the load and allow smooth rotation of the device._x000D_ Specification:50Pcs/20Pcs_x000D_ Colour:Silver_x000D_ Material:Metal_x000D_ _x000D_ Package Contents:_x000D_ 50Pcs x Bearings_x000D_ /_x000D_ 20Pcs x Bearings_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ Note: Light reflection 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._x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_