This pair of Titanium Marine-Grade 6-1/2 in. 500-Watt Wake Tower Speakers from Power Acoustik are housed in 100% waterproof enclosures. The speaker system is made of high-density ABS construction with UV coating. The steel-reinforced mounting bracket fits most towers. The speaker cones are polypropylene and the tweeters are titanium. Terminals are quick-disconnect compression type. A braided stainless steel safety cable and stainless steel mounting hardware are included.