Product OverviewKeep your trackball in top shape using this cleaning cloth made from high technology synthetic fibers. Microfiber fabric cleans delicate optical surfaces without scratching. Ideal for cleaning the ball and optical path elements of optical and optomechanical trackballs. Also good for cleaning computer monitor screens, CDs and DVDs. Will probably even clean optical mice :-) 9.8" x 11.8". Washable. White.