Stunning 12V Mirror polished Stainless Steel Single Trumpet Horn   Stainless steel non-magnetic grade with a bright polished finish that will not rust. Dimensions: Length=16" x Trumpet Diameter= 4.12" Designed for exterior mounting on any 12-volt vehicle and ideal for almost any weather condition.  Maintenance free, no compressor or hoses required. Includes a stainless steel adjustable trumpet support to prevent vibration and comes complete with rubber gaskets and stainless steel mounting hardware.