NXG Technology NX-PRO400W 4" 75-Watt 2-Way Outdoor Weather Resistant Speakers (pair) - White Metallic anodized injection-molded cone woofer with rubber surround 3/4" metallic anodized liquid-cooled aluminum dome tweeter UV treated, high impact ABS composite enclosure to resist sun fade and long term exposure to the elements; Powder coated rust-proof aluminum grilles Ratcheting mounting brackets allow for 180-degree rotation; Brass enclosure inserts accept universal style mounting hardware (not included) 12dB per octave electro-acoustic crossover design; White