Products 

Fire Alarm Unit

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The Universal Stopper from STI Inc. is a polycarbonate fire alarm unit with a strengthened continuous hinge. It offers excellent protection against physical damage, both accidental and intentional, according the company. The STI-13000 series protects indoor devices such as dual action pull stations, keypads for entry systems, intercom stations, emergency buttons, electrical light switches, duplex plugs, etc., without restricting legitimate operation.  Available in flush mount of surface mount models, indoors or outdoors.