Wolo 128 dB Truck Air Horn System - 855-860 Part #: 855-860 Line: WLO Wolo 128 dB Truck Air Horn System 1 Year Limited Warranty Color: Black Diameter (in): 18 Inch Material: Steel Number Of Wires: 5 Height (in): 17-1/2 Inch Height (mm): 216mm Length (in): 20-1/2 Inch Length (mm): 483mm Width (in): 8-1/2 Inch Width (mm): 457mm Hardware Included: Yes Bracket Included: Yes Hose Included: Yes Attachment Method: Bolt-On Voltage (V): 12 Volt Wire Gauge (ga): 10 Gauge Pressure (psi): 110 psi Frequency (Hz): 308, 337, 366 Hz Amperage (A): 22 Amp Sound Type: Air Horn Decibel Rating (dB): 128 dB Gasket Or Seal Included: Yes Switch Activation Type: Solenoid Deflector Included: No Number Of Trumpets: 3 Pressure Hose Length (ft): 5.55 Foot Pressure Hose Size (in): 1/4 Inch Show More Show Less