From Aerox are these high quality 7075-T6 alloy clamping servo arms.

Standard shape with holes positioned at 15.5 and 21mm distance from the centre of the spline.

3mm offset with a forward facing ball.

Beautiful black alloy with silver edging.

Super strong 7075-T6 Alloy with high tensile steel clamping screw.

25T Spline.