General description Fully compatible, high quality, and durable filters for Dyson vacuum cleaners. This replacement kit includes a washable pre-motor filter and a post-motor allergy HEPA filter. Technical specifications Yellow pre-motor washable lifetime filter diameter: 153mm Blue post-motor HEPA allergy filter diameter: 151mm Installation Easy to remove and replace as part of routine maintenance. Usage To keep your cleaner running at peak performance, please replace your filter every 2-3 months. Other information Package includes: 2 filters/set for Dyson vacuum cleaner filter kit.