Electric Multiple Units (EMU) are powered on the metro network of Athens, with five or six coaches. EMU-5s are of a former type and are limited to Line 1. On Lines 2 and 3, routes are only operated with EMU-6s. The trainsets were put into operation by STASY (Statheres Sygkoinonies) in 2011, with its establishment (previously operated from the companies ISAP S.A. for Line 1 and AMEL S.A. for Lines 2&3).