Vacuum HEPA filter replacement compatible with Milwaukee 49-90-1900 cordless vacuums, include the 28 Volt and 18 Volt models. This filter kit work as great as the original ones. You will get 2 wet dry filter kit replacement filters. This complete set provides enough clean replacements to keep your home truly clean and improve the air quality of your family. To ensure that your vacuum is working properly and optimally, it is recommended to replace the cordless vacuum filter every 3-6 months, depending on the environment and frequency of use.( Ensure the filter is totally dry before installing) To avoid secondary air pollution, the premium vacuum cordless filters with high efficiency to block fine particles, floating dust, etc. Effectively extend the life of the wet dry vacuum. Lifetime warranty! If you are not satisfied with our vacuum filter replacement, please free contact us and we provide friendly, easy-to-reach support.