10Pcs Miniature Sealed Metal Shielded Metric Radial Ball Bearing Model: 6701 ZZ 12X18x4mm

10Pcs Miniature Sealed Metal Shielded Metric Radial Ball Bearing Model: 6701 ZZ 12X18x4mm model: 6701ZZ Colour: silver Material: metal Size: 12 x 18 x 4mm(Inner Diameter x Outer Diameter x Thickness) 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. Package Included: 10pcs x 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.