GenExhaust for Champion Generator 3-hole round #90 generator exhaust extension allows for safe venting of exhaust fumes from an unoccupied enclosed area. This is designed for units that have three-hole spark arrester cover plate # 90. To verify this is the correct kit, please insure the screen cover has NO 90’ stamped on it. The buyer will receive: a custom low profile stainless steel exhaust stub, a high temperature stainless foil graphite gasket, a 4” duct adapter, and longer replacement screws.