STI 13330NB Universal Stopper Dome Cover, Enclosed Flush Back Box, Label Hood with Horn and Relay, No Label, Blue

Protect critical life-safety and access devices without compromising usability. The Safety Technology International STI 13330NB Universal Stopper is a professional-grade protective cover designed to shield pull stations, keypads, emergency buttons and other low-voltage devices from vandalism, accidental damage and harsh environments. When the dome is lifted, an integrated 105 dB horn and relay sound a local alert to draw attention before a false alarm is triggered, improving response and reducing unnecessary dispatches. Constructed from UV-stabilized polycarbonate with a NEMA Type 3RX enclosed flush back box, the cover provides dependable indoor/outdoor durability and weather resistance while maintaining ADA compliance and a low-profile flush mount. Sized to fit most pull stations and compatible with duplex plugs and intercoms, the STI-13330NB is ideal for schools, hospitals, commercial buildings and public facilities that prioritize security, monitoring and reliable operation. Add a robust layer of protection to your surveillance and safety systems—contact your sales rep or order online to protect devices and reduce nuisance alarms today.

• Prevents vandalism and accidental activations while preserving full device access for authorized users
• Built-in 105 dB horn with relay draws immediate attention when the cover is lifted to reduce false alarms
• UV-stabilized polycarbonate construction and NEMA 3RX enclosed flush back box deliver long-lasting indoor/outdoor protection
• Flush-mount form factor fits most pull stations and remains ADA-compliant for code-sensitive installations
• Tamper-resistant hinge and 3-year limited warranty minimize maintenance and lifecycle costs for facility managers