Description: Universal Compatibility: This dust collection bag is designed to be compatible with a range of industrial vacuum models, including BF500, BF501B, BF501, NF502, and BF585-3Material: Made from polyester fiber, this Vacuum Cleaner Dust Bag ensures durability and effective filtration for long term use in demanding environmentsEfficient Filtration: The advanced design of the filter bag helps take fine particles and prevents them from escaping back into the air, promoting a cleaner workspaceEasy to Replace: The vacuum bag is easy to replace, and replace it regularly can improve cleaning performance and suction powerPackage Includes: Each purchase comes with a dust collection bag, ready to be installed and used immediately with your compatible vacuum cleaner model Specification: 44cmx33.5cm/17.32inchx13.19inch Package Includes: 1 Vacuum Cleaner Dust Bag Note: 1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Wish you a wonderful online shopping!