Universal Stopper indoor/outdoor protective cover. Helps prevent false fire alarms. Cover offers excellent protection against physical damage (both accidental and intentional), dust and grime as well as severe environments inside and out. Constructed of clear polycarbonate, the cover is for flush mount. It is sized to fit most pull stations and has a high strength continuous hinge. Designed to comply with ADA, and it is less than 4 inches in depth. Clear cover does not restrict restrict legitimate alarms from being activated. Flush mounted cover. UL/cUL Listed, ADA Compliant.