The double hull tender sized from 360cm to 950cm, we call Bass boat. For High performance rib boat and Rib dive boat BB950, its main inside keel is made of 10mm aluminum plate. Its bottom hull and transom pad are made of 5mm aluminum plate. Boat has 500L built in fuel tank. This is luxury sport rigid boat model. Inner boat width is 185cm and boat tube diameter is 56cm. Boat stability is superb.