very first thing i printed was the impeller for this pump i have only used on 6v of power but the motor can handle up to 9 , works very well and fits together perfectly, holes for mounting screws must be drilled after as i was unable to successfully print them properly, some filing and your good to go. motor is from an xbox 360 controller with the vibration packs removed the rest is just designed to be small, not based on anything in particular.