Explosion-Proof Certified Horns: Type - Explosion-Proof Horn; Horn Style - Projector, Single; Mounting - (1) 3/4-in Hub; Voltage - 120VAC; Decibels - 105dB/10-Ft; Material - Aluminum; Size - 6.25"Dia x 10.25"L; Enclosure - NEMA 3, 7CD, 9EFG; Approval Listings - Cl-1, Div 1&2, C&D, Cl-2, Div 1&2, E,F&G; Manufacturer Series - ETH