This premium 04383 filter is fully compatible with Hamilton Beach TrueAir 04383, 04384, 04385, and 04386A air purifiers, replace Part # 990051000 The TrueAir filter has multiple layers of filtration, including an efficiency filter and a carbon pre-filter. It provides healthy, fresh air for those who demand it High-efficiency filtration layer improves air quality and promotes your health, can filter airborne such as smoke pollen dander hair smell. We recommend replacing the Hamilton Beach TrueAir air purifier filter every 6-8 months for optimal performance, depending on usage and environment. Installation is easy with no tools required We always available to assist you and provide the best customer service experience. If you have any problems with your filters, Please contact us 4 Pack 990051000 Replacement Filter Compatible with Hamilton Beach TrueAir Air Purifier 04383 04384 04385 04386