The design features rugged aluminum construction, and an anti-tamper circuit for triggering an alarm if power is cut or the end cap is removed. Mounting hardware is included.

Seco-Larm Enforcer Curtain Sensors - 22.5 In. - Black (E-9622-4B25). Rugged aluminum construction. Multi-Frequency: Reduces interference and eliminates crosstalk when multiple units are used in close proximity to one another.