C-3PO's C-Family Protocol torso.
C-Family Protocol torsos were parts for droids made by Cybot Galactica. They were traditional protocol-style torsos. The torsos were made of copper, titanium and rubber, and the material composition was not conducive for magnetism. They had medium-to-low material durability and weighed 37.0 kg.
These torsos were part of the famous 3PO-series.