STI-1221D Strobe Damage Stopper and Open Backbox with Conduit Knockout

This virtually indestructible cover (solid for strobe unit alarms) is designed to stop vandalism and accidental damage for surface mounted units. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal use. Unit comes with a spacer with knockouts for mounting over exposed conduit.