Compatible Models: This replacement filter fits Honeywell humidifier models HE100, HE150, HE220, HE225, HE240, and Aprilaire models 110, 220, 500, 500A, 500M, 550, 550A, 558. Also compatible with Lennox WB212, Hamilton 12hf, and more for versatile use. Reinforced Filter Material: Constructed from high-quality reinforced paper, these filters offer enhanced durability and efficiency. They outperform standard wicking filters by maintaining their structure and performance over extended use. Optimal Moisture Distribution: Featuring a high-output honeycomb design, these filters ensure even and thorough moisture distribution. This design maximizes the efficiency of your humidifier, ensuring your home benefits from optimal humidity levels. Advanced Filtration Technology: Equipped with the ability to significantly reduce pollutants in the water, these filters promote a healthier breathing environment. Enjoy cleaner, more comfortable air throughout your home with every use. Easy Maintenance: Designed for low maintenance, these filters require only annual replacement to maintain peak performance. Keep your home's humidity at ideal levels effortlessly, ensuring a comfortable and healthy living environment year-round. Colour:White Material:Wood pulp paper Due to different batches, there may be differences in product appearance and printed text, which will not affect use Package Contents: 2 * HC22P Humidifier Filter Pad