Stangenes Industries model SI-11422 / 8674962 high-voltage isolation transformer. Used. Primary: 120V 50/60Hz, Secondary 1: 7.2V, 3.5A, Secondary 2: 120V 0.15A. Rated for at least 15KVDC isolation between primary / secondaries (units do not have isolation rating printed on label, but were removed from working 15kVDC systems).