[Compatible Models] Compatible with Holmes Units: CAP531-U, CAP529-U, HAP240, HAP242, HAP412, HAP422, HAP424, HAP706, HAP716, HAP9240, HAP9242, HAP9412, HAP9414, HAP9422, HAP9424,HAP1200. Compatible with Bionaire Units: BAP260, BAP815, BAP825, BAP9200, BAP9700, BAP520.[Effective Filtering]Replaces Filter A, Filter D, Filter K.[High-quality]The filters is made of high-quality material, which can work compatible with 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. Becompatible withe installing this component, please unplug the power supply.colour: as shownMaterial: plastic + activated carbonPackage Contents:2 x filters4 x Carbon Booster Filters1 x cleaning brushOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.