Fangrui Product Details Compatibility: Designed Specifically For Hard Floor Expert Vacuum Models 3831 Hf2, 3845, 3847, And 3848. These Parts Match Original-part Numbers B0555, 1637755, And 1632973, Ensuring A Seamless Fit And Optimal Performance In Your Vacuum Cleaner. High-quality Construction: Crafted From Material, These Parts Maintain The Integrity And Functionality Of Your Vacuum. The Roller Brushes And Filters Are Engineered To Perform Just Like The For-originals, Without Scratching Floors Or Furniture, Ensuring A Thorough Clean Every Time. Maintenance Made Simple: Extend The Life And Efficiency Of Your Vacuum With Our Washable And Reusable Parts. For Results, We Recommend Replacing The Roller Brushes And Filters Every 2-4 Months, Allowing Your Machine To Continue Operating At . Comprehensive Set: This Valuable Package Includes 2 Roller Brushes And 4 Filters, Accompanied By A Cleaning Tool To Assist In Maintaining Your Vacuum Parts. This Set Provides Everything Needed To Refresh And Ma