Features1Effortless Installation: The seat post adapter shim can be easily installed or removed, allowing you to quickly switch between seatposts whenever necessary, enhancing your overall riding experience. 2Aluminum Alloy Construction: Made from 6061 aluminum alloy, this seatpost adapter is lightweight yet robust, ensuring longevity while avoiding rusting and erosion, making it ideal for outdoor conditions. 3CNC Machined Processing: The seat tube adapter shim features a finely CNC machined CD textured processing that not only provides a sleek finish but also enhances grip, ensuring a stable and secure fit for your seatpost. 4Versatile Compatibility: Designed for wide compatibility, the seat post reducer shim is suitable for various cycles types, including mountain cycles and road cycles, making it a versatile accessory for any cyclist. 5Package Value: Includes two seat post adapter shims, providing value while ensuring you have a spare on hand, offering flexibility for different adjustments.SpecificationItem Type:SeatPostAdapterShimMaterial: Aluminum AlloyPackage List2 xSeatPostAdapterShim