Material: Our products, the rear motor cover with rear filter set, are made of high-quality materials and are more durable. Includes 1 rear motor cover and 1 rear filter. It can be easily removed and replaced as part of normal maintenance. Rear motor cover: The rear motor cover is used to connect the motor and filter. Rear filter: The rear filter is used to block fine particles and airborne dust to prevent secondary air pollution. Special abilities: Improve the filtration of the vacuum cleaner and reduce noise. The rear filter is used to block fine particles and airborne dust to prevent secondary air pollution. Fits: Dyson v7 v8.