Niles CM7BG (Ea) ) 7-inch 2-Way In-Ceiling Background Loudspeaker (CM7BG) Integrated Woofer/baffle Design Delivers Greater Low Frequency Response By Employing A Larger 7" Woofer Where Competitive Models Of The Same Outer Size Employ Only 6 1/2" Woofers In The Same Size Speaker Installation Polypropylene Cone Is Light, Strong And Well Damped To Provide "best In Class" Bass Response 13mm Kaladex Tweeter With Fluid Cooling Provides Wide Dispersion For Clear And Detailed High Frequencies Weather Resistant Construction Reduces Installation Limitations And Provides Unique Solutions In Moist Environments Or Outdoors Under Eaves Single Speaker - Sold Individually - Purchase Two for a Pair.