HexTronik HXT 10kg Servo (Metal Gear) 55g / 10kg / .16sec Dimensions: 40.7 x 19.7 x 42.9mm / Approximately 1.6 x .75 x 1.7in Metal Gears Voltage: 5 - 7v Speed: .16 Seconds / 60 Degrees Weight: 55g / Approximately 2 ounces