IKEY manufactures devices to reduce risk of failure in your hazardous areas. The PM-5K/IS comes enclosed in non-corrosive stainless steel with optical isolated barriers for complete protection. It has a Factory Mutual approval for Class I, II, and III, Division I, Groups C, D, E, F, and G.Features Conxall bulkhead cable with PS/2 configuration 17.7 x 9.1 x 2 (w-d-h) Stainless Steel Case