21Japan/Futaba Servo Horn/Arm
thingiverse
Fits Servos (21 Japan, Futuba FP-S28) or any old school servo that has the square mounting post of 4mm sq. Recommend using PLA+ filament for super strong/durable parts. I received a dozen of these old servos that still worked but didn't have the horns. Couldn't find any online anywhere so I made my own. Decided to share. Hope they work for you!
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