Double Shaft Nema23 Stepper Motor Nema23 56mm 1.3N.m Holding Torque 3A per phase bipolar 4 lead wires Dual shaft: front 8mm flat 18mm and total length 25mm, rear 6.35mm flat 15mm and total length 20mm Black n Green, Red n Blue are phase A+ n A-, B+ n B- It's widely used on CNC Router, CNC Lasering, ...