O.E. Universal Disc Horn, available in 12, 24, 36, & 48-volts, 2 terminal screw type - easily fits industrial equipment motorcycles, cars and trucks. Painted steel construction assures long life in all weather environments and has an attractive front plastic grill. Easily installs in any one (1) or two (2) wire system. The diameter is 96 mm. Comes with a heavy-duty steel zinc plated 90 degree mounting bracket.