1. The replacement filter is compatible with Dyson V7 Animal, V7 HEPA, V8 Absolute vacuum cleaners. The HPEA rear filter is only suitable for Dyson V7 and V8 vacuum cleaners. Not suitable for V6 vacuum cleaners. Replacement part numbers 965661-01 and 967478-01. 2. Premium HEPA pre-filter and post-filter, effectively blocking small particles, floating dust and most allergens, dust mites, pollen, etc. Ensure your vacuum cleaner works at its best. It is recommended to replace the filter every 2-3 months or depending on usage. 3. Package Contents: 2 x Dyson filter, 2 x Dyson V8 HEPA filter. 4. Cleanable and reusable filter before the motor. Easy to replace, install and disassemble. Come back for fresh air and a chance to breathe again. 5. If you have any questions, please feel free to contact us.