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 and a neodymium magnet;Pair of marine certified speakers perfect for use in boats of all types;Maximum input power: 135 watts;The item is non-returnable