Raboesch Bow Thruster 19/22mm x154mm These very powerful bow thrusters are supplied fully mounted with a Power 400 7.2-Volt electrical motor The propulsion is provided by a flat propeller (pedal) which pressurises the water through jet nozzles whereby the entire assembly functions as a pump. This design is very robust and very stable and requires the very little maintenance. 19mm Internal Diameter / 22mm OD