M&S NR8 8" Ceiling Mounting Ring The NR8 Ceiling Intercom Speaker Mounting Ring is a rough-in ring designed to fit 8-inch Model NR8P Ceiling Intercom Speaker. You'll need one of these for each 8 inch ceiling intercom speaker you install.
…back to the master intercom station. For rough-in, a Model NR8 Ceiling Intercom Speaker Mounting Ring is required with this model speaker. 8-inch recessed ceiling mount speaker 45-ohm impedance for intercom use White frame and white plastic grille Requires NR8 mounting ring Indoor Music Only