Amarine-made 12v Marine Boat Stainless Steel Dual Trumpet Horn, Low and High Tone, 18-1/2" Two trumpets that are 100% stainless steel 304 non-magnetic grade with a bright polished finish that will not rust Trumpets are mounted next to each other for easy installation Engineered for exterior use in almost any weather condition including fresh or salt water Does not require a compressor or hoses, saving time and money Includes a stainless steel adjustable trumpet support to prevent vibration and comes complete with rubber gaskets and stainless steel mounting hardware