STI 13510NK Universal Stopper without Horn Enclosed Back Box Open Mounting Plate, No Label Included, Black

Protect critical alarm and access devices with the Safety Technology International Universal Stopper protective cover. The STI 13510NK is a durable, indoor/outdoor security cover designed to prevent vandalism, accidental activation and environmental damage to pull stations, keypads, intercoms and emergency buttons without impeding normal operation. Molded from thick, UV‑stabilized polycarbonate, this black surface‑mount cover resists impact and yellowing for extended life in harsh conditions. The unit includes an enclosed back box to safeguard wiring and an open mounting plate for quick, professional installation; it is UL/cUL listed, NEMA Type 3RX rated and ADA compliant to meet code and facility requirements. Because it omits a horn and label, the STI-13510NK is ideal where discreet protection and uninterrupted monitoring are essential—security integrators, facilities managers and contractors can standardize protection across campuses, healthcare sites, schools and industrial locations. Enhance your security and surveillance infrastructure by adding a robust protective barrier that maintains device accessibility and reliability. Order the STI 13510NK today to fortify your emergency and access control devices.

• Guards pull stations, keypads and emergency buttons from vandalism and accidental damage to minimize service interruptions
• UV‑stabilized polycarbonate construction delivers long-lasting outdoor performance and resists yellowing
• Enclosed back box and open mounting plate protect wiring while allowing fast surface installation
• Designed to preserve legitimate operation—no horn restriction and ADA/UL listings support code-compliant installs
• Sized to fit most pull stations and common access control devices for simplified inventory and deployment