Features1Package included: 1 front hub, 1 rear hub and 2 skewers. 2With 36 hole drillings, compatible with 5/6/7/8S rotary freewheel. 3Precision-machined steel bearings for a smooth and fast ride. 4Low-friction seals effectively shut out water, mud and dirt. 5Quick release lever allows for fast installation and removal 6Internal grease sleeve helps maintain and increase service life of hubs. 7Aluminum alloy hub shell and anodized processed skewers for easy maintenance and long time last.SpecificationAS an important role to connect bike spoke and axle, thishub set with professional bearings inside will be smooth and silent rolling and great to keep out the dirt and mud.Feature:Package included: 1 front hub, 1 rear hub and 2 skewers.With 36hole drillings, compatible with 5/6/7/8S rotaryfreewheel.Precision-machined steel bearings for a smooth and fast ride.Low-friction seals effectively shut out water, mud and dirt.Quick release lever allows for fast installation and removalInternal grease sleeve helps maintain and increase service life of hubs.Aluminum alloy hub shell and anodized processed skewers for easy maintenance and long time last.Specification:Material: Aluminum alloyColor: Black / Blue / Red / Golden(Optional)Compatibility: 5 / 6 / 7 / 8SrotaryfreewheelFront Hub Length: 100mm / 3.9inRear Hub Length: 135mm / 5.3inWeight:291g / 10.2oz(F), 338g / 11.9oz(R)Package Size: 25 * 17 * 5cm / 9.8 * 6.6 * 1.9inPackage Weight: 674g / 23.7ozPackage list:1 * Front Hub1 * Rear Hub2 * Quick Release LeverPackage List1 * Front Hub1 * Rear Hub2 * Quick Release Lever