47:1 Planetary Gearbox Nema 23 Stepper Motor 2.8A for DIY CNC Mill Lathe Router Bipolar Stepper, Holding Torque: 40Nm ,Rated Current/phase : 2.8A Gearbox Type: Planetary Frame Size: 60 x 60mm / 2.36x 2.36" , Motor Length: 56mm / 2.20" ,Gearbox Length :72mm / 2.83" 4-wires (Black, Green, Blue, Red) , Weight: 1.7kg