GOOD FIT: This A10/A11 Pre Filter fits for A10/A11 Hero, A10/A11 Master, for Pure One S11 Series Cordless Vacuum Cleaners, helps your vacuum run back to level. DESIGN: 3 pieces A10 filters in one set help you always have one filter to . Just say goodbye to the days when you have to worry about the lack of extra filters. Quality above all: Made from state-of-the-art high-strength materials, the A11 filters are designed to outlast. Easy to install: Free your hands from the complicated replacement steps. No additional required. Reminder: To your vacuum works properly and optimally, it is recommended to replace the A10 filter 1-4 months depending on . Colour: gray Material: plastic Package Contents: 3 * Vacuum filter Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.