4 Packs of 3 Micro Filtration Bags by EnviroCare Technologies. 12 Bags total. Additional Details ------------------------------ Bullet point: Designed to Fit: Royal Dirt Devil Type U, MVP Swivel Allergy Vacuum Bags, Ultra, Magnum, Powercast, Protege, Regina, Feather Glide, Procision, Magna Power, Breeze Lightweight, Privilege, Platinum Force Vacuum Cleaners, 3-920750-001, 3920047001, 920047, 454745, 40100526, 50178 Product description: Designed to fit original manufacture # : Royal / Dirt Devil # 3-920750-001, 3920047001, 920047, 454745 Hoover Part # 40100526 Sears Upright Royal Dirt Devil # 50178 Fits these models series and others: Swivel Glide 086350 Ultra, Ultra MVP 086500, Ultra MVP PF Magnum, Magnum MVP, Platinum Magnum MVP Royal Powercast RY9000, RY9100, RY9200 Royal Protege RY7200, RY7300, RY7400, Regina HDU500, HDU200 Feather Glide 085700J Royal Procision RY7000, RY7050, RY8000 Magna Power Breeze Lightweight Privilege Platinum Force Featherlite Dirt Devil Upright 86505