Siemens WBBS-R-3/4T-3/4B

DescriptionConsisting of red-coated finish and part of the Siemens Series of Fire-Alarm Signaling Devices, Model WBBS-R-3/4T-3/4B is a sturdy die-cast red weatherproof back box with a threaded conduit hole with three-quarter-inch (1.91 cm) knockout for outdoor applications. Model WBBS-R-3/4T-3/4B, which is used with Siemens Models MH115; MTH-15-115, and with B6 and B10 bells, is also compatible with Model AH, MBDC and SETSF-series appliances.