Stainless Steel Dual Trumpet Electric Boat Horn AFI Stainless Steel Dual Trumpet Electric Boat Horn looks good on any vessel. The compact design allows this horn to be installed in smaller spaces. Exterior is made of stainless steel with the interior diaphragm is made of type 304 stainless steel to keep the inner workings protected. Product Features Stainless Steel Exterior 12 Volt Maximum Amperage Draw 7 Amps Dimensions 16 L x 7.5 W x 4 H Type 304 Stainless Steel Diaphragm dB Rating 110 at one