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You may spot a Stopper during your next vacation: St. Louis Arch, San Francisco, Antartica, Disney, etc.


Stopper II

Testimonials


STI Products Work!
I use the STI Stopper II on all the manual pull stations in the university dorms and the number of false fire alarms has been cut in half.

Jay Klimchuck
Electrician
U-Mass Dartmouth, Housing Department

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