LUH-TP covers rough openings in recessed installations. The backbox is ideal in schools, medical facilites, transportation terminals, prisons, commercial or industrial spaces and where the durability of an extreme weather- resistant backbox facilitates installation of environment resistant horn Model LUH-15T. The clean, square design is precision formed from 20-gauge stainless steel and finished in powder epoxy paint for exceptional durability in both indoor and outdoor installations.