Features: Mouse weight can enhances the stability and control of the mouse, suitable for high-precised gaming and design work. Easy to install and ensures excellent handling and precise. Quality metal, it is full of durability and long time use. Very suitable for esports players, professional, and users who require high-performances mice. 6.5gx2+3gx4 and 4gx2+2gx4 counterweights optional and can be freely combined to achieve multiple weight configurations. Specifications: Material: Metal Type: 6.5gx2+3gx4, 4gx2+2gx4 (optional) Packed Box Size: approx. 5cm/1.97inch Applicable Model: for G502 Wireless Mouse Package Includes: 1 Set Mouse Counter Weight note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.