The powerful ""Monster"" performance series from Savox utilize an all aluminum case, unique brushless motor and controller technology to boost power up to 35% over previous generation servos. Spline size: 25T Spline Servo Technology: Digital High Voltage Servo Case: Aluminium Input Voltage (V): 6.0V - 8.4V Water Protection: Waterproof Motor Type: Brushless Motor Gear Material: Steel Gears Ball Beared: Ball Beared Length (mm): 40.3 mm Width (mm): 20.2 mm Height (mm): 38.7 mm Weight (g): 81.0 g Speed 60°/Sec @ 6.0V: 0.16/60° sec Speed 60°/Sec @ 7.4V: 0.13/60° sec Speed 60°/Sec @ 8.4V: 0.11/60° sec Torque kg/cm @ 6.0V: 45.0kg/624.9oz-in Torque kg/cm @ 7.4V: 55.0kg/763.8oz-in Torque kg/cm @ 8.4V: 70.0kg/972.1oz-in Connector type: JR (SAV-SW2290SG-BE)