CLEAN & FRESH AIR QUALITY: Replacement D Filter with Pre-Filter Fitted Carbon Sheet for Holmes AER1 Air Purifiers removes pollen, dust, and odor indoors to keep your house's air quality safe and clean for your family to breathe in. TRUE HEPA FILTRATION: True HEPA purifier performance catches up to 99.97% of particles in the air and traps it into its filter panels; great choice for allergy sufferers and germophobes who want to remove allergens that makes it hard to breathe. LONG LASTING CLEAN AIR: This filter generally lasts for 6 months before needing to be replaced so you can enjoy clean and filtered air for long. EASY INSTALL & REPLACEMENT: This filter is designed to fit Holmes Air Purifier Filter D; once the filter indicator light for your model alerts you to replace it, simply take out the old one and mount the unit into the filter slot. Simple, quick, and easy with no tools required. DELIVERS EXCEPTIONAL PERFORMANCE: Every filter from us made from premium quality material and will perform as excellently as filters. You are assured performance from your air purifier with our filters. colour:purple & black Material:Composite material Package Contents: 4 * Replacement Filter 8 * carbon spray sponge