Coil Resistance: 4.2 Ohms ~ 7.4 Ohms> ? Current Rating (Amps): 750mA ~ 2A> ? Features: Flatted Shaft> ? Mounting Hole Spacing: 1.220" (31.00mm) > ? NEMA Frame Size: 17> ? Rotor Inertia: 37gcm² ~ 75gcm²> ? Size / Dimension: Square - 1.654" x 1.654" (42.00mm x 42.00mm)...