Pulley M5 - T5 with 12 teeth for nema14 fix

thingiverse

The pulley is a device used to change the direction of force applied to an object, typically by using a wheel and rope system. It makes it easier to lift heavy loads because it allows users to apply less force while moving objects that would otherwise be difficult or impossible to handle manually. The pulley's primary function is to convert force into motion in a more efficient manner.