STI STI-13320NB Universal Stopper with Horn Enclosed Flush Back Box, No Label Included, Blue

Protect critical access and alarm points with the STI STI-13320NB Universal Stopper security cover from Safety Technology International. Designed for commercial and institutional security and surveillance installations, this blue polycarbonate protective cover shields pull stations, keypads, intercoms and emergency buttons from vandalism, accidental triggers, dust and severe environments without restricting legitimate operation. The model STI-13320NB features an enclosed horn flush back box for audible alert integration, a low-profile/dome option with a maximum 4-inch protrusion, and ADA-compliant design to meet accessibility requirements.

Built from impact-resistant PC material and made in the US, the Universal Stopper simplifies maintenance and reduces false alarms—helping security and monitoring teams maintain reliable system uptime. Gaskets are included for secure flush mounting, and the product is backed by a three-year limited warranty. Ideal for building security, fire alarm protection, and access control projects, the STI-13320NB integrates seamlessly into surveillance and monitoring systems. Specify the STI Universal Stopper for your next installation to enhance protection and continuity of operations.

• Prevents vandalism and accidental activation while allowing legitimate use for pull stations, keypads and emergency buttons
• Integrated horn-enclosed flush back box provides audible alert capability without compromising protection
• Durable polycarbonate (PC) construction resists impact, dust and harsh outdoor environments for long service life
• Low-profile dome design (max 4" protrusion) and ADA-compliant form factor fit most installation requirements
• Broad compatibility with duplex plugs, light switches, intercoms, keypads and pull stations for flexible security deployments
• Gaskets included and backed by a 3-year limited warranty for reliable performance and lower lifecycle costs