Features: brand new and high quality Replace old, broken or non-working wheel. It is used to repair the mouse, and make it work properly. High quality for professional use. Black / for grey / for your choice. Easy to use stable Specifications: Material: Metal Color: black , for grey , (optional) Diameter: approx. 2.3cm/0.91in Applicable Model: for G102 G102hero G304 G305 Mouse Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1PC Mouse Wheel