Description :<br>Activated Carbon HEPA Replacement Air Filter Net Without Border <br>Features :<br>HEPA replacement filterAllergen removerRecommended by allergistsPurifies airHelps capture up to 99.7% of particlesFits honeywell true HEPA air purifiers<br>Specification :<br>Filter Type : HEPAMaterial : PP filter paper + Polypropylene hot melt adhesiveSize : 30 x 30 x 2.5cm<br>How to DIY the HEPA Air Purifier :Touch both sides of the HEPA， Relatively one is rough side， one side is relatively smooth.The rough surface that is in front of your face， smooth surface is attached to the fan outlet that side.Dirty air through a smooth surface by the rough surface of clean air.<br>Package includes :<br>1 x HEPA Air Filter Without Border<br>Details pictures :