WALU2 Quad/Twin: WaveWALU2 Quad Twin: Wave G 10 windsurfing fin AREA: 115 127 139 cm2 We added this version of the twin fins for twin fins wave boards as they more drive then the regular walu's. They are also great for Heavy wights on larger quad boards with the side fins set up. The extra tip area gives more drive upwind and a bit less of the skatey feel of the reg walu's. Louis (designer): "A little bit more area at the tip in the WALU2 version, ideal for twin setup. In