Safety Technology International, Inc. STI-14200NC Universal Stopper Low Profile without Horn Housing with Surface Mount, Clear Protective Polycarbonate Cover - This unique Indoor/outdoor polycarbonate cover helps stop false fire alarms without restricting legitimate operation of pull stations. This tough polycarbonate cover is ideal for schools, hospitals, nursing homes, stores, hotels and public buildings of almost every kind. The strong, durable construction takes the toughest knocks while it guards against accidental or intentional physical damage. The cover is 4 inches in depth and clear, flush mount with a clear housing. Sized to fit most pull stations. It protects pull stations, keypads, intercom stations, emergency buttons, electrical light switches, etc. It is ADA Compliant and UL/CUL Listed for US and Canadian safety standards. Stopper is UV-Stabilized to keep cover clear from the elements. There are mounting options that consist of a flush mount cover or a waterproof Type 4X enclosed back box or low profile, surface mount cover with a clear conduit spacer. Polycarbonate rated -40° F to 250° F (-40° C to 121° C). STI "We protect the things that protect you."