These NEMA 17 stepper motors are direct replacements for the Rostock MAX kits as well as the ORION. They come with 750mm long wires with pre-installed locking connectors to directly plug into the RAMBo boards or a 4 pin non shrouded connector with .1" spacing, 5mm shafts that are 22mm long with a flat on the shaft for better holding of the timing pulleys. 76oz in. of torque and 300mm long wire leads with a 4 pin non locking connector already installed.