Krypt 6.5" Wakeboard Tower Speakers Clamp Sizes: 1 1/4", 1 1/2", 1 5/8", 1 3/4", 1 7/8", 2", 2 1/4", 2 3/8", 2 1/2" Krypt 6.5 Spealers 120 watt max, 65 watt RMS CNC Machined solid 6061 Aluminium Fittings American Owned Company Double Polished 6061 Aluminum