9kg Servo (Metal Gears) Analog servo with stronger metal gears wear resistant case. Features double ball bearings and weighs just 55 grams only. Includes 2 servo horns 4 rubber gromets 1 servo horn screw and 4 servo mount screws. 40mm long x 19mm wide x 38mm tall (measurements exclude the servo gear and the mounting tabs on either side) Input voltage 4.8v - 7.2v Turning time in seconds 0.25 Part Number: GS-5509MG Made by: GoTeck