[Premium Quality Material:] Made of environmentally friendly materials, it helps to increase the service life and effectiveness of the vacuum cleaner, keep your room clean, and improve air quality.[Highly Efficient Filtering Technology:] High-efficiency pre-filter and HEPA post-filter can effectively block small particles, dust, hair, debris, pollen, etc., to ensure a clean and hygienic environment in the room.[Perfect Fit:] After testing, it is perfectly compatible with for Dyson DC37, DC39, DC28, DC53 Series vacuum cleaners. Instead of Part NO. 923413-01, it is easy to use and replace without additional tools.[Easy To Clean:] According to the environment and frequency of use, it is recommended to replace the filter every 3-6 months. During this period, it can be used again after cleaning and drying every month.[Function:]HEPA filtration system captures and seals 99.9% of pollen and fine particles as small as 0.1 Micrometre, such as smoke, dust, etc. Protect your family from breathing troubles and enjoy a clean and comfortable living environment.Colour: blueMaterial: plasticPackage Contents:1 x Pre Motor Filter1 x 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.