The L Series Surface Mount Back Boxes are designed to fit L-series alarm (alerting) devices.
They provide a mounting option for surfaces such as concrete and brick.
Back boxes are available for L-series wall-mount (rectangular) and ceiling-mount (circular) devices.
The L series surface mount back boxes include an earth plate and earth screw for electrical earthing and threaded knockout holes for ¾-inch conduit adapters.
Ceiling Mount Surface Back Box, Red
Wall Mount Surface Mount Back Box, Red