6 large pulley printed with Prusa i3 MK2 Original. Used in my electric ice auger!Ratio 1:75 (12 000 RPM to 160RPM).<br>14.8v Lipo battery<br><a target="_blank" rel="noopener noreferrer" href="https://www.youtube.com/watch?v=FABgeHfGETY">https://www.youtube.com/watch?v=FABgeHfGETY</a>