OSD Audio IW840 8-inch Polypropylene In-Wall Speaker Pair Woofer: 8-Inch mica-filled polypropylene cone Tweeter: Pivoting 1-Inch Silk Dome Power handling: 175W, Impedance: 8 Ohms Frequency Response: 36Hz - 22kHz, Sensitivity: 90dB Cut Out Dimension: 12 3/4-Inch x 8 3/4-Inch, Unit Dimension: 13 3/4-Inch x 10-Inch x 3 3/4-Inch Shipping: This item does not ship outside the U.S