Features: Upgrades for MX 1S/2S with precisions engineered mouse wheel, feet pad, and complete replacement kit for enhanceds scrolling accuracy and long performances. Featurings metal scrolls wheel for smooth navigation and ergonomic friendly , paireds with low frictions upgraded feet pad to minimize wear during extended use. for designers, programmers, and office professional control and comfort during intensive tasks or creative workflows. Perfectly for home offices, gaming setups, and workspaces where cursor movement and ergonomic support boost productivity. Simplifys maintenance with included specializeds tool, allowing quick customization of scrolls resistance and feet pad replacement for users. Specifications: Material: Plastic and Aluminum Alloys for MX 1S/2S Package Includes: 1Set Mouse Wheel with Skates note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item. Thank you!