Features: Metal Sealed Shielded 3 Parts Roll Axial Ball Thrust Bearing 51100 10x24x9mm These bearings are pre-lubricated with grease. These balls or rollers "bear" the load, allowing the device to spin smoothly. Bearings reduce friction by providing smooth metal balls or rollers and a smooth inner and outer metal surface for the balls to roll against. Specifications: Condition: Brand new Type: 51100 Materal: Bearing steel Inner Diameter: 10mm Outer Diameter: 24mm Thickness: 9mm Weight: 20g Package Included: 1x Thrust Ball Bearing