This pair of White Marine-Grade 6.5" 500-Watt Wake Tower Speakers from Power Acoustik is housed in a 100% waterproof enclosure. The speaker system is made of high-density ABS construction with UV coating. The steel-reinforced mounting bracket fits most towers. The speaker cone is polypropylene and the tweeter is titanium. Terminals are quick-disconnect compression type. The RMS on this system is 250W, frequency response is 40Hz?20kHz. Dimensions are 8.5"H x 8.5"W x 9"D. A braided stainless steel safety cable and stainless steel mounting hardware are included.