Compatible with for Shark IW3511. Please note check vacuums in size, model before order.Great value combo set to keep your room clean and comfortable.Washable & Reusable. Rinse with clean water and let it completelyair dry before reusing filter. For optimal performance, it is recommended to change this filter set once every 1-3 months.Easy to Replace and Install, When it needs to be replaced, just remove and replace from your machine equipment, no tools required.Please note; the physical slightly color difference or difference, does not affect the use, please do not mind, thank you Material: plasticcolour: As ShownPackage Contents: 2 x Black filter elements2 x black filter cotton2 x aromatherapy2 x curved filters2 sets filter cotton2 x high efficiency filtersOnly 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.