STI 1221C Stopper Dome and Strobe Damage Stopper and Open Back Box with External Mounting Tabs

Protect critical notification devices and reduce costly downtime with the Safety Technology International STI 1221C Damage Stopper cover. Designed specifically for strobe and horn applications, this mounting accessory shields fire and security signaling equipment from vandalism, impact, and the elements while preserving full visibility and sound performance. Constructed from thick, transparent polycarbonate (PC), the cover is UV- and weather-resistant and engineered to withstand hard knocks without obscuring visual strobes. The open-back box and external mounting tabs simplify surface or conduit mounting and provide quick service access — ideal for high-traffic public spaces, schools, hospitals and industrial sites. At 8.5" H x 6.5" W and durable break-resistant construction, the STI-1221C meets UL/cUL listing requirements, is ADA compliant, and includes a 3-year limited warranty for dependable long-term protection. Integrate this security cover into your fire alarm, monitoring, and surveillance systems to extend equipment life and maintain code compliance. Add the STI 1221C to your next installation to safeguard alarms and ensure uninterrupted notification performance.

• Reinforces alarm reliability by protecting strobes and horns from vandalism and accidental damage
• Clear, thick polycarbonate maintains visual and signal integrity while offering UV and weather resistance
• Open-back design with external mounting tabs allows easy surface or conduit mounting and fast service access
• UL/cUL listed and ADA compliant for code-ready installations in commercial, educational, and healthcare facilities
• Durable, break-resistant construction backed by a 3-year limited warranty for long-term asset protection