TRANSFORMER, PRIMARY 120VAC - SECONDARY 24VAC, 20 VA, 2 MOUNT HOLES 2-3/4" MOUNT HOLE CTRS. (4) 1/4" TABS, ENCLOSED COIL. GROEN KETTLE AHS, TDH, DHS AHS-40, BPM-30G, BPM-30GS, BPM-40G, BPM-40GS, BPP-30G, BPP-40G, TDH-40, TDHC-20, TDHC-40 BRAIS BPM-40G Groen 137487