These short can NEMA 17 stepper motors feature 34oz/in. of torque and are what's used on our Eris Delta 3D printers for the towers. They draw appx. .35 amps at 12v and are 1.8 degree (200 step). They are 4 wire motors with 300mm long leads and come with a 4 pin non-locking connector already installed. The shaft is 5mm with a flat on one side and is 24mm long.