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Did you know?


Polycarbonate is so strong it is used for “bulletproof” windows and other applications requiring great flexibility and strength.



Testimonials


STI Products Work!
Our STI Stopper II units have prevented after–school activity kids from pulling false fire alarms. If kids attempt to open the cover, the warning horn stops them from any further attempts.

Robert Finnen
Director Buildings and Grounds
Susquenita School District

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