Compatible Model: IW3511 Filter Kit Fit for IW1111 Detect Pro Stick, Fit for IW3511 Vacuum Cleaner Filter Kit: Works together to help your IW3511 Detect Pro vacuum cleaner work better, keep your room clean and comfortable. Washable: Foam filter and Hepa filter are reusable, just use for cleaning, then reuse after drying. Cartridges: IW3511 anti-smell cartridge for a house, it is recommended to replace the filter every 1-3 months depending on the frequency of use Please note: Physical color difference or difference does not affect the use, please don't worry! Color: as shown Material: Plastic Package Contents: 2 * Black Filter Cartridges 2 * black filter cotton 2 * Aroma Diffuser 2 * Curved Filters 4 sets * Cotton Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.