CORELESS DIGITAL SERVO .13/305 Dimensions(mm): 40.3x20.2x45.0 Weight(g): 79.0 Speed(@4.8V sec/60): .15 Torque(@4.8V oz-in): 250.0 Speed(@6.0V sec/60): .13 Torque(@6.0V oz-in): 305.5 Gear: Unique Steel Bearing: 2BB Case: Full Aluminum 25 Tooth Spline