South Coast Twinzer Surfboard 7'0"Dimensions: 7'0" x 21. 63" x 2. 75" x 46L The South Coast Twinzer blends the speed and freedom of a classic twin with the added control and drive of the twinzer fin system. Built for surfers who want the loose, fast feeling of a twin but with more hold through turns, this board delivers effortless speed and smooth rail to rail flow. The twinzer setup uses small forward canard fins paired with larger twin fins to redirect water along the rail line.