1,Used in lake,river,or sea; 2,small power; Product details: Norminal ratio: 2.0:1,2.5: ... ,3.5:1 and 4.0:1; Rated input speed: 1000-2000r/min; Center distance: 135mm; Clutch type: hydraulic control,wet ... (L*W*H): 422*555*563mm; Net weight: 92KG; ze16A small marine gearbox,marine gear box,planet gearbox