The Irnyso Replacement Furnace Pilot Unit Kit 1820-009 is specifically designed to fit ROBERTSHAW PG9A25 and PG9A1 models. This kit includes all the necessary components to ensure a proper replacement of the pilot unit in your furnace, providing efficient and reliable operation. Ideal for HVAC and industrial applications, this product from Irnyso is a trusted choice for maintaining and repairing heating systems.