Compatible models: Compatible with Holmes devices: CAP531-U, CAP529-U, HAP240, HAP242, HAP412, HAP422, HAP424, HAP706,HAP716, HAP9240, HAP9242, HAP9412, HAP9414, HAP94222. Compatible with Bionaire units: BAP260, bas815, bap625, bas9200, BAP9700, BAP520. Clean and fresh air quality: Replacement D-filter with pre-filter equipped decal for Holmes AER1 air purifiers removes pollen, dust, and odor in the room to maintain air quality keep your home clean and clear so your family can breathe.True HEPA filtration: True HEPA purification efficiency catches up to 99.97% of particles in the air and traps it in the filtration panels; a great choice for allergy sufferers and germophobes who want to remove allergens that make breathing difficult. Easy to install and replace: This filter is designed to fit the Holmes D air purification filter; When the filter indicator light for your model notifies you to replace it, simply remove the old one and install the new unit in the filter slot. Simple, quick and easy with no tools required. Delivers exceptional performance: every filter from us is made of the highest quality material and will perform as perfectly as the filters. You can be sure that your air purifier with our filters. This filter usually lasts 6 months before needing to be replaced, so you can enjoy clean and filtered air for a long time. Color: purple + black Material: composite material Package contents: 4 * replacement filter 8 * carbon sponge 2 * cleaning brush Only 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 error is +/- 1-3cm.