GRI N20RS-T-BL 3/8" Recessed Stubby Closed Loop, MM-400 Rare Earth Magnet Terminal, Black

Secure thin vinyl windows, sliding sashes and overhead doors without costly drilling or cosmetic damage. The George Risk Industries GRI N20RS-T-BL is a recessed magnetic contact engineered for installers who need a low-profile, high-performance sensor that supports reliable security and surveillance monitoring. With a compact 3/8" recessed profile and a rare-earth magnet under 1/8" high, this closed-loop contact delivers consistent actuation even on narrow frames while maintaining discreet aesthetics.

Designed for real-world installations, the N20RS-T-BL offers a standard gap performance (approx. 0.38") and maintains reliable operation on wider gaps up to 3/4" in many installations. The package includes mounting screws and double-stick tape for fast, non-invasive mounting — or glue the magnet into place for a truly flush finish. Built from stainless-steel materials and finished in black, the contact resists corrosion and blends with modern window and door frames.

Ideal for alarm panels, perimeter protection, and building surveillance, this GRI recessed magnetic contact simplifies installs and improves reliability. Add the N20RS-T-BL to your next security project or order a pack to standardize installations across sites.

• Protect thin vinyl windows and overhead doors without drilling thanks to an ultra-low 3/8" recessed profile
• Rare-earth magnet under 1/8" delivers strong, reliable contact for consistent security monitoring
• Closed-loop design supports dependable perimeter and overhead door surveillance systems
• Quick, non-invasive installation — includes mounting screws and double-stick tape; also glueable for flush mounting
• Durable black stainless-steel housing blends with frames and reduces visible hardware for professional installs