Nippon Train Horn Full Size 4 Horns Chrome. Features/Specifications: 2 small horns (11in long; 6-1/2in diameter) 1 medium horn (13-1/2in long; 6-1/2in diameter) 1 large horn (15-1/2in long; 6-1/2in diameter) Made from zinc alloy material Sound level 125 dB's Requires THSY3075C OR THSY5150C air compressors Specifications for Nippon Train Horn Full Size 4 Horns: Manufacturer: Nippon Color: Chrome Features of Nippon Train Horn Full Size 4 Horns: 2 small horns (11in long; 6-1/2in diameter) 1 medium horn (13-1/2in long; 6-1/2in diameter) 1 large horn (15-1/2in long; 6-1/2in diameter) Made from zinc alloy material Sound level 125 dB's Requires THSY3075C OR THSY5150C air compressors Package Contents: Nippon Train Horn Full Size 4 Horns Nippon THSY-1075-H4: Train Horn Full Size 4 Horns Chrome