STI 13420NK Universal Stopper with Horn Enclosed Back Box Sealed Mounting Plate, No Label Included, Black

Secure critical alarm, access and emergency devices with the Safety Technology International STI 13420NK Universal Stopper protective cover. Designed for facility managers and security integrators, this robust cover prevents vandalism and accidental activation while allowing legitimate users immediate access. Constructed from UV-stabilized polycarbonate, the unit is rated NEMA Type 3RX for durable indoor/outdoor protection and resists impact and environmental wear.

The STI-13420NK includes an integrated 105 dB horn for audible deterrence and rapid notification, plus an enclosed back box and sealed mounting plate to protect wiring and simplify surface-mount installation. Sized to fit most pull stations and compatible with duplex plugs, switches, keypads and intercom stations, its low-profile black finish blends into access control and surveillance installations and meets ADA requirements for accessible emergency equipment.

Ideal for schools, commercial properties, healthcare and industrial sites that require reliable security and monitoring, this protective cover enhances system longevity and reduces false alarms. Add the STI 13420NK to your next deployment to safeguard alarms and streamline maintenance.

• Protects critical alarms, pull stations and access keypads from vandalism and accidental damage while preserving full device operation
• Integrated 105 dB horn provides audible deterrence and fast alerting for security and monitoring systems
• UV-stabilized polycarbonate construction and NEMA Type 3RX rating ensure reliable indoor/outdoor weather resistance
• Enclosed back box with sealed mounting plate simplifies surface installation and protects wiring integrity
• Low-profile design fits most pull stations, is ADA compliant, and blends into access control and surveillance environments