Feature:1. Use good aluminum alloy material to prevent rust and corrosion.2. Fine craftsmanship and strict manufacturing techniques make it more durable.3. High-strength bearing intermediate parts, durable and long service life.4. Long / short versions are available for different types of mountain bikes.5. Replace old bearing parts to make your mountain bike perform better.Specification:Item Type: Mountain Bike Hub Bearing Condition: 100% Brand NewMaterial: Aluminum AlloyColour: As shown in pictureSize: Long / Short (Optional)Long: Approx. 19 x 7.8cm / 7.5 x 3.1inShort: Approx. 16.5 x 7.8cm / 6.5 x 3.1inWeight:Long: Approx. 387gShort: Approx. 318g.Package List:1 x Mountain Bike Hub Bearing Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.