The Robertshaw 1820-009 PG9 Right Hand Pilot Generator and Thermopile is a replacement part designed for Honeywell brand furnaces. This corded electric pilot unit has a voltage of 0.75V and is compatible with the PG9A42JTL020 model. Manufactured by Robertshaw in the United States, this 32-inch long generator and thermopile is essential for maintaining and repairing household furnaces efficiently.