The size 8 [20mm] Hybrid Rotary Stepper Motor has Max. 0.02Nm of holding torque. Encoders and 22mm frame planetary gearbox solutions are available. For special windings or customization, Please contact DINGS' for further information Material End bell : Aluminum alloy Bearing : Deep groove ball bearing Magnet : Sintered NdFeB Shaft : Stainless steel Wiring : UL 3265, 28 AWG