Kleinn Air Horns 102 Dual Truck Horn - Chrome-Plated Copper Dual Air Horns, 16-3/4-Inches and 14-1/2-Inches Long Trumpets For Deeper Truck Horn Sound All Chrome Body With Chrome Plated Spun Copper Trumpets Vortex 4  12-Volt Electronic Air Horn Solenoid Included Up to 153.6-Decibel Output