Key features

• •REPLACEMENT TRACKBALL - Designed for any trackball mice using 1.34 (34mm) trackball size; Such as: PERIMICE-517/717, MX Ergo, M570, Cordless, TrackMan Wheel (not include Trackman Marble), M-XT3DRBK (EX-6), M-DT2URBK, EX-G/DEFT, MA-WTB43BK
• •SMOOTH SURFACE - The surface is treated with a special coating to provide a precise and smooth tracking performance
• •ABSOLUTE SPHERICAL - A diameter of 1.34 inches; Provides fast movements and works perfectly for multiple screen control
• •HOW TO REMOVE THE TRACKBALL - The trackball from PERIMICE-517/717 can be easily removed from the bottom hole of the mouse, using the tip of your finger
• •GLOSSY FINISH: Glossy trackball color; The model also have several variants color in glossy red, green, black, blue, purple, yellow, silver, gold, and white. There are also two models with the matte finish in red and optic yellow.