The Yellowfin range is constructed of 6mm marine grade aluminum bottom sheets and 4mm side sheets. The ‘Marine Core’ construction ensures that strength really does come from within with a subframe rib structure of longitudinal and latitudinal ribs made from 6mm vertical stringers and 5mm horizontal ribs to reinforce strength and the shape of the hull. While the self-draining floor is supported by a box section floor frame. The backbone of the Yellowfin, the keel and chines are reinforced by being welded a huge four times and all extrusion is specifically designed for marine use. This is one tough rig.