The superb sound of the Fultone I Series twin air horns from FIAMM is suitablefor heavy-duty trucks and off-highway vehicles. The sleek self-mount stylefeatures stainless steel non-corrosive finish, and the horns produce a minimumof 114 Db with a harmonic sound. Includes the gasket, mounting hardware and airfittings. Uses compressed air only Stainless steel trumpets Decibels: 114 Mounts with one bolt and nut (included) Uses a minium of 15 psi to operate Kit comes with the universal air horn installation kit