1.MATERIALS: Forged aluminum alloy material, Sturdy, corrosion-resistant, rust-free, high toughness, no deformation, durable for more safety when use.2.FUNCTIONAL GASKETS: The bicycle neck extender is equipped with 5 washers, each of which is 10mm and the height is increased to 100mm.3.ADJUSTABLE: The height of the extender can be adjusted by adjusting the number and type of spacers, reducing the pressure of waist effectively, biking more relaxed. Take the discomfort away from your upper back, neck and wrist.4.EASY INSTALLATION WIDELY COMPATIBLE: Just connect the original front fork to complete the installation. Our bicycle Fork Stem Extenders are suitable for most 1-1/8(28.6mm) threadless steerer mountain bikes, road bikes MTB bike and more.5.Adjustable Height : You can freely adjust the stem riser to fit your own height, that will make your riding more comfortable. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please dont hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it