Mallofusa Servo Arm Horn Metal Aluminum 25t Silvery for Rc Car Helicopter Round Mg945 Mg995 Mg996 Material: CNC Aluminium Mounting Hole Spacing: approx. 14mm Servo disc diameter: approx.20mm Pinking aperture: approx.5.5mm Suitable for Hitec, Parallax, Futaba and other brands (40  20  36mm) standard servos