Polk Audio DB651s Slim-Mount 6.5-Inch Coaxial Speakers (Pair) Durable butyl rubber surround stands up to the stress of extreme temperatures, sunlight and time Equipped with a dynamic balance polymer/mica composite mineral-filled cone for a big sound Equipped with a 0.75-inch liquid-cooled silk-polymer composite dome tweeter Pair of marine certified speakers perfect for use in boats of all types Maximum input power: 165 watts Pair of marine certified speakers perfect for use in boats of all types Equipped with a 0.75-inch liquid-cooled silk-polymer composite dome tweeter Maximum input power: 165 watts Equipped with a dynamic balance polymer/mica composite mineral-filled cone for a big sound Durable butyl rubber surround stands up to the stress of extreme temperatures, sunlight and time