Fangrui Product Details 1. Practicality: Designed Specifically For Roborockflexi Pro / A20 / A20pro Floor Scrubbers. These Tailor-made Accessories Ensure A Fit And Functionality. 2. Enhanced Cleaning Efficiency: The Roller Brush Can Effectively Clean A Variety Of Floor Types, Such As Hardwood, Tile, Marble, Laminate And Linoleum, And Can Clean Thoroughly Without Damaging The Floor Surface. 3. User-friendly Maintenance: Both The Roller Brush And The Filter Are Designed For Easy Maintenance. The Filter Can Be Rinsed With Water To Maintain Its Efficiency And Should Be Replaced Every 3 To 6 Months To Ensure The Optimal Performance Of The Floor Scrubber. 4. Advanced Filtration Technology: The Filter Is Able To Capture 99. Of All Particles As Small As 0.3 Microns, Including Dust, Pollen And Other Allergens, Ensuring A Cleaner And Healthier Environment In Your Home. 5. Enhanced Durability: Make Sure You Have Enough Spare Parts On Hand To Ensure That They Can Be Replaced In Time As Needed, Thereby Maintaining The Opti