RED Black Twin TRUMPET SNAIL High/Low Tone 12v Volt Electromagnetic Loud Dual Replacement HORNS (Quantity 2) Compact Complete Universal Kit with Brackets Relay Hardware for Porsche 356 911 912 930 914 924 928 944 959 968 Boxter Carrera GT Cayenne Cayman Panamera MADE IN ITALY! Dual ELECTROMAGNETIC Horns. Very compact. Universal Fitment / Relay and 2 Mounting Brackets plus Instructional Installation Diagram Included. Super Loud - Sound Immediately Activates. No time-delay between the time you press the horn and the time it sounds. No External Air Supply Needed Made of Metal and Thermoplastic for a Long Lasting Finish. Truly, High-Quality, NOT A CHINESE HORN! Superb Quality! Mounting Type: Single Screw - Terminal Contacts: Blade Type - Includes RELAY and 2 Universal Mounting Brackets Diameter = PICTURED in BOTH METRIC and IMPERIAL Measurements. Horns can easily be tucked in most tight areas allowing for dimensions pictured. Will fit any car, truck, or SUV with a 12V electrical system. Will fit motorcycles with space to house compact horn (see dimensions) using 12v system.