Digital Hi-Volt, Hi-Speed HS-5665MH: Universal Speed (6.0v/7.4v) 0.16/0.14 at 60 Torque (6.0v/7.4v) 122oz-in. (8.8kg-cm) /139oz-in. (10.0kg-cm) 3-pole ferrite (7.4v wind) motor / dual ball bearing mr106 Dimensions 1.6" x 0.8"x 1.5" (41 x 20 x 38mm) / weight 2.1oz (60g) Gear type - heavy duty metal gear train (mk first gear)/ 24t standard spline