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. | Includes 4-pack aer1 hepa filters and 8-pack aer1 carbon filters. Spare filter allows you to clean air at anytime for your home. | Designed to fit for aer1 ready air cleaner , Replaces A Filter, D Filter, K Filter. | Meet Your Needs: If for any reason you are not happy with our replacement filter, please let us know and we’ll make sure to sort out the issue fast. Your satisfaction is our first priority!