Upgrade your wet dry vacuum performance with this premium 49-90-1900 HEPA filter replacement kit. Designed for long-lasting daily use, our high-efficiency pleated filter delivers 99.97% filtration of 0.3-micron fine particles, effectively trapping wood dust, construction debris, fine dirt, pet hair and other tiny pollutants to keep your cleaning environment fresh and tidy. Equipped with foam sleeve pre-filters, the double-layer filtration structure can intercept large impurities like hair, paper scraps and gravel in advance, prevent the main filter from clogging, stabilize strong airflow and suction, and greatly protect the vacuum motor while extending the service life of your cleaning equipment. Made of high-quality durable materials, these replacement filters are fully washable and reusable. Just rinse with clean water and air dry thoroughly for repeated installation and use, helping you cut down frequent replacement costs and reduce daily maintenance expenses. This all-in-one 4-pack value set comes with 4 HEPA filters, 4 foam sleeve filters and 1 dedicated cleaning brush, meeting your daily replacement, backup and deep cleaning needs. Easy to install and disassemble, no extra tools required, ideal for household, workshop, renovation and multi-scene wet and dry cleaning work.