Compatible with Black + Decker 3-in-1 Lightweight Corded Upright and Handheld Multi-Surface Vacuum EV1416 Regular maintenance is essential to ensure optimal performance. We recommend replacing the filter every 1-3 months to maintain the maximum performance of the vacuum cleaner Easy installation without require any tools, make sure it is extremely dry before reinstall the replacement filter Package includes 4 Pack HEPA Filters, 8 Pack Foam Filters and even a dust brush Customer Service: If require any information about our products, please feel free to contact us at any time. Your satisfaction is our utmost priority Aolleteau 4 Pack HEPA Filter & 4 Pack Foam Filter Compatible with Black + Decker 3-in-1 Lightweight Corded Upright and Handheld Multi-Surface Vacuum EV1416