Boat Reversible Water Jet Drive 28 mm impeller, ready for 3D print files, in stl format. This part has been printed on an Ender 3 from PLA, tested and works perfectly . The model is reversible so you can reverse the direction of the water jet stream by attaching a servo to the central part called Tija C1 . Parts Biela C1 and Biela C2 must be printed 2 pcs.Assembly is done with M3 screws and the Intake part has slots for M3 nuts with stop .If any information is needed i am able to provide.Thank you .