20Pcs 13Size Miniature Metal Shielded Sealed Groove Model Ball Bearing Size: MR74-ZZ 4 x 7 x 2.5mm
- model: MR74-ZZColour: Material: metalSize: 4 x 7 x 2.5mm(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.
