Metal Mounting plate to adapt trackball to wood or metal control panels. Available for 1-1/2", 2-1/4", 3" and 3" High Ball Trackballs. Durable Black River powder coated finish or Clear zinc finish available. Innovative method of securing trackball to plate to allow for now external hardware along top surface of mounting plate. Includes all necessary washers and nuts to assemble. Trackball sold separately.