Plastidroid
this was a specialized form of espionage and combat droids produced by Cestus Cybernetics during the height of the Clone Wars, based on the JK-series of biodroids. In their inert form, plastidroids were amorphous bundles of technology. Hidden within their shells was a collection of magnetically encoded components which, when activated, moved into position to form limbs, weapons, and other implements. These components were made of metal and plastine, and were designed to connect in a myriad of ways. The filmy skin of the plastidroid conformed to whatever new shape the droid assumed, keeping the internal components protected and lubricated. When fully assembled, a plastidroid stood more than five meters in height, and moved about on specialized treads.