Great sounding 2-Way speaker pair (2 pcs) for your environmental/outdoor/boating listening pleasure.   Pro Mica Injected Cone with TPU (treated polyurethane) edge. Waterproof and corrosion proof marine speakers designed for salt-water or fresh-water environments. Hose 'em down - won't hurt 'em. U.V. Stabilized for excellent sunlight protection and longevity. Ultra low Magnetic Field (shielded) to insure minimum interference with other electronics. Mounting screws included. Comes with full 1-Year Product Warranty Key Features - Full 7/8" Dome Tweeter (coaxial centered) - U.V. Stabilized black speakers - Impedance: 8 ohm (can be used for 4 ohm apps) - Frequency Response: 80Hz - 22KHz (in box)   - Max power: 40W - Dimensions: Outer Diameter: 4.5", Mounting hole size: 3.25", Depth: 1 11/16". - Screw to screws bolt center: 3 3/4"