The new DBL-810-TB is constructed using a highly rugged, stainless steel case and industrial silicone rubber pad, ensuring NEMA 4X protection. The DBL810TB’s trackball pointing device is a completely sealed, 25mm unit. The trackball is operated using sealed stainless steel switches with left, right, and middle click functions.Features Stainless Steel Case and Industrial Silicone Rubber Pad 14.80" x 5.72" x 1.25" (whd) PS/2 and USB compatible