The Castoldi waterjet unit type Jet 05 is the smallest of the range equipped with the same valuable items as the larger ones; among these: the built in gear box, the disconnecting mechanical clutch and the movable debris screen grid on the water intake. It is ideally suited to equip in single or twin, boats typically of 4,50\7,50 m long. Thanks to its integrated gearbox and shafts design close coupling kits, specially designed by Castoldi with flanges and flexible joints, are available for almost all the engines on the market, reducing dramatically overall length and weight of the complete propulsion system.