Actually it is the largest model of the Castoldi range of water jet drives. Equipped (as Turbodrive 238 H.C. and Turbodrive 400 H.C.) with hydraulic clutch, integrated gear box (with N.20 gear rations available) and all the items making it a self contained propulsion system ideally suited to equip in twin, triple or even quadruple installation fast vessels typically in the 18-30 m range.