Replace your pre and post filters regularly, it can reduce infiltration of dust, pollen and other allergens into the air you breathe, replace every six months for optimal use.You just need rinse with clean water and let it completely air dry before reusing them. very simple,effective,easy to use and clean, you'll just love them!Premium quality for Dyson Post HEPA Filter&Pre filters compatible with for Dyson V7 and V8 Cordless Stick Vacuum Cleaner, this filter set will be the instant favorite every for Dyson vacuum cleaner Owner.Package include 2pack Pre filters, 2pack V7 V8 HEPA Post filters, 1 pack yellow cleaning brush.Fits for Dyson V7 and V8 Cordless Stick Vacuum Cleaner, replace parts # 96566101, 96747801.TIPS:HEPA Postfilter Kit Can Replace For Dyson V8 V7 (Not for Dyson V6).Colour: purpleMaterial: plasticPackage Contents:2 * Pre filters2 * Post filters1 * Cleaning brushOnly the above package content, other products are not included.Note: Light shooting 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.