Duplex Speedy & Whisper Vacuum Cleaner Paper Dust Bag 20 Pack Quality Replacement Vacuum Cleaner Bag Brand: Duplex Quantity : 20 Pack Models this Item will fit: Duplex Speedy 350 & Whisper 400 Customer Information Replacing your bags and filters regularly will improve the cleaning performance and suction of your vacuum cleaner. Please note that Manufacturers Brand Names, part numbers and model numbers are used for customer reference only. This item is a quality, compatible replacement product.