EGR filter for holmes aer1 hapf300ah remover filters - replacement parts hapf300ah-u4r & hap242-nuc - 4 true hepa + 8 pre filter

?Compatible Models? Compatible with Holmes Units: CAP531-U, CAP529-U, HAP240, HAP242, HAP412, HAP422, HAP424, HAP706, HAP716, HAP9240, HAP9242, HAP9412, HAP9414, HAP9422, HAP9424. Compatible with Bionaire Units: BAP260, BAP815, BAP825, BAP9200, BAP9700, BAP520. | ?Effective Filtering?Replaces Filter A, Filter D, Filter K. | ?High-quality Materials?The filters is made of high-quality filter paper and durable plastic frame, which can work for a long time. It is more durable and saves the cost of living. | ?Replacement Suggestion?It is best to replace the filter at least once every 4 months. The details will vary according to the frequency of use. Before installing this component, please unplug the power supply. | ?Packing List?Package include 4 HEPA, 8 Pre Filter, 1 cleaning brush.