20Pcs Miniature Sealed Metal Shielded Metric Radial Ball Bearing, 10Pcs 5X10X4MM & 10Pcs 5X9X3Mm
- 20Pcs Miniature Bearing: 10Pcs 5X10X4MM & 10Pcs 5X9X3mm
- 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.
