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Protective Cabinets, Covers and Enclosures

Did You Know?
In some states, stealing a fire extinguisher is a third-degree felony punishable by up to five years in prison, a fine up to $5,000 or both?

Prevent Theft
Did You Know?
STI Exit Stopper has been used to keep a teenager from sneaking out of the house at night.

No Sneaking Out!
Did You Know?
Can’t hear your existing doorbell in your basement, garage, shed, etc. With wireless ease extend the chime to greater distances.

Extend Chime
Did You Know?
Stopper II has been helping stop false fire alarms for over 30 years.

Stopper II
Featured Product

STI-13420CY
Universal Stopper® with Horn, Enclosed Back Box, Sealed Mounting Plate, Custom Label

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About STI Protective Cabinets, Covers and Enclosures

Our range of lockable polycarbonate enclosures, bio protector covers and control panel enclosures are perfect for anti-vandalism and protection against accidental damage or the environment.

Strong and durable, all of our protective cabinets, covers and enclosures guard against both accidental and intentional physical damage.

The Stopper Line includes smoke detector covers and cages, heated cabinets, weatherproof enclosures, lockable polycarbonate enclosures and CCTV damage stoppers designed for anti-vandalism.