These 15 Vacuum Bags are designed to fit Kirby vacuums. Designed by ZVac these generic premium Vacuum bags replace Part# 204803 & 205803. You can be confident that these Vacuum Bags fit all Kirby Models Generations G3, G4, G5, G6. Ultimate G, Sentria (Before 2009). This is high quality Vacuum Bag and is free from defects and provide a great value. These micro-filtration bags feature a Multi-ply design which sets them apart from lower quality 1 ply bags and the help remove dust pollen mold spores and other airborne household allergens.