15:1 Planetary Gearbox Nema 23 Stepper Motor 2.8A for DIY CNC Mill Lathe Router Bipolar Stepper, Holding Torque: 15.5Nm , Rated Current/phase : 2.8A Gearbox Type: Planetary Frame Size: 60 x 60 mm / 2.36 x 2.36" , Motor Length: 56 mm / 2.20" , Gearbox Length :60 mm / 2.36" 4-wires (Black, Green, Blue, Red) , Weight: 1.5kg