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Horn Kit Air 2-Trumpet Highway, 24v, 320 High-Tone / 300 Low-Tone 118Db at 3m (6ft.), Chrome, Required Air Press. 4.0-8.5 bar (60-125psi). Valve sold

HL85118 - 005411001: Twin-Tone Air Horn Kit Low-Tone/High-Tone for use with Compressed Air Brake System

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Truck Air Horn Ld-304 Four Pipes Electronic Air Pressure Horn 12v

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Model 102-1 Dual Truck Horn - Kleinn Automotive Accessories

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Best Air Horn (Review & Buying Guide) in 2023