Fit Model: IW3511 Filter Kit Fit for IW1111 Detect Pro Cordless Stick, Fit for IW3511 Vacuum Filter Kit: Works together help your IW3511 Detect Pro Vacuum works better, keep your room at clean and comfortable. Washable: Foam filter and Hepa Filter are reusable, just use water for cleaning, then reusing after drying completely. Green Cartridges: IW3511 odor- for a -smelling home, recommended to replace the filter every 1-3 months depending on the frequency of using Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:As Shown Material:Plastic Package Contents: 2 * Black Filter Cartridges 2 * black filter cotton 2 * Diffuser 2 * Curved filters 4 Sets * Filter Cotton Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.