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Stopper II® with Spacer Installation (STI-1130)

How to easily install the Stopper II® with spacer.


This unique Stopper II protective cover has helped prevent false fire alarms around the world for over 40 years, without restricting legitimate operation of devices. Ideal for schools, colleges, hospitals, nursing homes, hotels and all public buildings where there is a history or a threat of false fire alarms.


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