Ying-ti 4 HEPA Filters + 8 Carbon Booster Filters for Holmes AER1

Compatible with Holmes Units: CAP531-U, CAP529-U, HAP240, HAP242, HAP412, HAP422, HAP424, HAP706, HAP716, HAP9240, HAP9242, HAP9412, HAP9414, HAP9422, HAP9424 | Replaces A Filter, D Filter, K Filter Compatible with Bionaire Units: BAP260, BAP815, BAP825, BAP9200, BAP9700, BAP520. | Package 4 hepa +8 carbon filter.