GE model Fusible Unit from General Electric. 100A single unit, 3 Phase, 240V, 150HP Maximum. No mounting hardware is needed for bus connections. This is a bolt to bus type older style now obsolete fusible switch. Conductor kit will be required for panel board mounting. Consult sales office. QMR323 Refurbished by General Electric. Same switch was later made and known as a THFP's.