The small double hull tender sized of 300cm,330cm,360cm and 390cm. we call Classic boat. Classic boats are made of 2.5mm thick powder coated marine grade aluminum for boat hull and 1100 Dtex pvc fabric or 1.0mm hypalon fabric for inflatable tube. Lightweight aluminum yacht tenders and alloy deck rigid inflatable boat CL300 has double flat boat hull and single front locker.