C-3PO arm Pistons that I designed to match the Sequel Trilogy suit version. Matches overall layout and proportions to photo reference, but I didn't have real measurements from the screen used, or high quality pictures so there's probably some flaws.

Mirror them to have 2 arms worth of parts. The back piston is actually for a left arm, but front piston is for a right arm. It is because of a hole on the end thats meant to be on 1 specific side depending on which arm.

Screw hole is 1mm, but can be edited to be custom sized to your needs. A version of these pistons are included in my full arm page, but include bigger screw holes, designed for specific hardware.

Use with 1/4" Aluminum rod cut to a usable length.
The 'arm piston stopper' file is meant to be glued onto the inner end of the aluminum rod to prevent the rod from pulling out.
The random little hole on the side of the piston is on the screen used, and can be decoration, or actually utilized with a screw to be used instead of the stopper file, but would require a slit to be sawed into the middle of the rod.