Features: Upgradeds for MX Ergo mouse with replacement top shell button PCB, to enhanceds performances and ensures fit with original equipment. from PCB materials, this PCB longevitys and comfort, making it for users seekings reliability and Precisions. for MX Ergo users lookings to replace damaged components or elevates their mouse experience to next level. for various such as office work, projects, and gaming, ensuring your mouse operates smoothly and efficiently. Experience a renewed of control and functionality with essential accessory, tailoreds to meet the demands of modern computings tasks. Specifications: Materials: PCB Size:5.0cm/1.97inch Package Includes: 1Set Mouse Upper Motherboards note: Please allow 0-1cm error due to manual measurement. makes sure you do not mind before you bid. Due to difference between different monitors, the picture may not reflect the actual color the item. Thanks!