The seat post adapters in this set are good for adjusting the fit of your bike's seat post. They allow for precise height adjustments, ensuring a comfortable and efficient riding position. Made from durable materials, these adapters are designed to provide a secure fit and performance, making them an essential accessory for any cyclist. Features - Color: Black -Material:TPR - Size: 6.40X1.80X0.30cm/2.52X0.71X0.12in -Durable and reliable: constructed from durable, wear resistant materials, these bicycle spacers are built to last, reducing the need for frequent replacements and ideal for both daily commuting and outdoor adventures -Seamless integration: these precision engineered spacers fit a variety of bicycle hubs, solving compatibility issues and ensuring a good fit for easy assembly -Stability enhancement: designed to improve wheel stability, these spacers enhance overall riding stability and safety, providing a better cycling experience -Effortless installation: with a simple installation process that requires no professional tools, these spacers are good for quick and easy setup -Comfort enhancement: these spacers are optimized for shock absorption, effectively reducing road vibrations and enhancing comfort during long distance rides Package list: 8pcs Handlebar Stem Spacer Shims