Small Rear Wheel Hubs for Scooter 1,meterial:aluminium alloy 2,size:17mm/22mm 3,customer- ... and gland6.Noise inspection7.Appearance inspection8.Rust prevention9.Product packaging Small Rear Wheel Hubs for Scooter1,meterial:aluminium alloy2,size:17mm ... , free sample, you just pay for the freight5, used for scooter, motorbike, bike, tricycle,segway etc. Pictures: