Description
Consisting of white coated finishing and part of the Siemens Series of Fire Alarm Signaling Devices, Model SPEXT-W is a round extension ring that measures 7.8 inch (19.8 cm.) in diameter and 1.03 inch (2.62 cm.) deep. Used with the Model SE-MC-C speaker-strobe appliances, Model SPEXT-W has a square cut out of 4.8 inch (12.2 cm.).