MTX TM7702 7.7 Marine Coaxial Speakers Polypropylene cone woofer Rubber surround 1" Teteron tweeter Board coating designed to protect against corrosion and the elements 7.7" Thunder Marine Series Marine Speakers 7.7" Marine Coaxials Marinized housing Impact/UV resistant grilles Saltwater spray tested to ASTM B117-03 18" Wiring harness included