PERFECTLY FIT COMPATIBILITY -- After Motor and Before Particle Filter Replacement Swap Kit for Dyson V7 and V8 Cordless Stick Vacuum Cleaner. PREMIUM QUALITY -- Made from high strength, eco-friendly materials . Ideal for removing food, hair, pollen, dirt, dust and pets, ensuring there are no contaminants around your living areas. WASHABLE & REUSABLE -- In order to increase the performance of our filters, we recommend that you rinse the prefilter at least once a month with clean water, after washing, please let the filter air dry naturally. And replace it every three to six months (3-6 months). VALUE KIT -- You get 2 pre-filters, 2 post-filters and 1 free cleaning brush. Premium pre-filters and high-efficiency HEPA post-filters block fine particles, floating dust and most allergens, dust mites, pollen, etc. MEET YOUR NEEDS -- If you have any questions, n do not hesitate to contact us. We strive to provide the highest quality products and efficient customer service.