The A050E991 Cummins Onan Maintenance Kit is designed for use with the Cummins Onan Gasoline RV Generator QG 4000 Series.This kit has everything you need to keep your RV's Cummins Onan Generator running at peak performance. Cummins Onan generators are known for their high quality and dependable performance. To maintain that performance level, service and maintain your generator with genuine Cummins Onan parts.Kit includesOne Air Filter (140-3280)One Fuel Filter (149-2457)One Spark Plug (167-0275)Two Ona Max Oil (326-5336)