Overall, the Siemens ZB-R Weatherproof Back Box consists of a red-coated finish and part of the Siemens Series of Fire-Alarm Signaling Devices. Besides, the Siemens ZB-R is a back box use for mounting Siemens Model Z-series horns, strobes, and horn-strobes. Also, each Siemens ZB-R back box measures 5.2 inches (13.2 cm) [H] by 5.6 inches (14.2 cm) [W] by 1.1 inches (2.8 cm) [D].
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