This durable, sealed sound unit is constructed of 304 stainless steel inside and out and comes with a 5-year rust warranty. Meets ABYC specification A-23 for boats up to 12 meters (39'). Fits existing hole patterns and are pre-wired. Max. amp draw: 4 amps. 114 dB rating. 13-1/2"L x 3-1/2"W x 4"H. 304 stainless steel inside and out | Stainless Steel Shorty Single Trumpet