This is universal gearbox, u can use it as hight RPM output or hight torque output. U can use it where ever u need.
Look my tutorial video how i made it!!
U also need: Aluminium pipe D8,5mm with hole D4,5mm. OR Bearings 4x8x5mm Aluminium rod 4mm 5min eboxy glue
Filament: Spectrum PLA, ABS Green and Gray
I recommend print gears with ABS or PET-G. Gearbox body u can print PLA.