The two-stage centrifugal water​​ pump

The two-stage centrifugal water pump. It has been designed for 3D print. It needs   also an axis, and 2 bearings with 5 mm internal ring and 16 mm outernal. This pump can be set on a drill, electric screwdriver and etc. As well you can scaled this models and use others bearings. Also, I have the solid models if you need. 

Some video https://www.youtube.com/watch?...