XIANQI 【Package Includes】Our set includes 2 washers, 1 main body and 6 bolts, you don't need to purchase additional accessories. Colour: Black 【Size】The inner diameter of our gasket is 15mm, the thickness is 5mm, the thickness of the hub adapter is 5mm, and the length of the screw is 14mm. 【Material】Our front bicycle power-assisted hub conversion adapter is made of high-quality alloy, which is durable, wear-resistant and not easy to rust. 【Application】Our hub conversion adapter is a very important bicycle component, which can convert a 100mm*15mm front hub to 110mm*15mm. 【Easy To Install】Our hub conversion adapter is easy to install, comes with the necessary accessories, no complicated steps, and can be easily installed by non-professionals.