OMG-ST-55BF parameters [Voltage] 6.0－8.4V [speed] 6.0V: 0.125sec/60° 7.4V: 0.105sec/60° 8.4V: 0.095sec/60° [Torque] 6.0V: 45kg-cm (625 oz-in) 7.4V: 52kg-cm (722 oz-in) 8.4V: 56.5kg-cm (785 oz-in) [Gear] Stainless steel teeth [Shell] Full metal CNC shell [Size]40x20x41.5mm