Niles CM8HD (Ea) 8-Inch Two-way In-Ceiling Loudspeaker with Pivoting Tweeter (FG01663) 8" IMPACT (Improved Aluminum Ceramic Technology) Woofer Cone With Curvilinear Profile And Extended Pole Provides Natural, Flat Response 1" Nano-coated IMPACT Dome Tweeter Utilizes A Vapor Deposited Coating To Move Any Ringing Frequencies Outside The Range Of Hearing For Ultra-detailed High Frequencies Proprietary Bridge-mounted Tweeter Pivot Mechanism Focuses The High Frequency Sound In Any Direction Up To 20 Without Diffraction Weather Resistant Construction Reduces Installation Limitations And Provides Unique Solutions In Moist Environments Like Bathrooms Or Outdoors Under Eaves Single Speaker - Sold Individually - Purchase Two for a Pair.