Please kindly noted that this item is sold by rongyigou from Joybuy marketplace. Air Purifier Filter Replacement Compatible with AIRTOK AP0601 AP0601 Air Purifier Filter Replacement Compatible with AIRTOK AP0601 Air Purifier 4-Stage H13 True HEPA Filter AP0601-RF 【Compatible with】--Perfectly compatible with AIRTOK Air Purifier AP0601, Part #AP0601-RF. NOTE: Please check the model before purchase. 【4-Layer Filtration System】--Our AP0601 replacement filter is designed in 4-in-1 True HEPA Filtration. 4-layer filtration system includes: Pre-Filter layer + blue nylon layer + H13 true HEPA layer + activated carbon layer. 【True HEPA Filter】--The H13 true HEPA filter can efficiently filter out 99.97% of particles as small as 0.3 microns, like dust, dander and pollen, creating fresh air for you and your family to breath and sleep easier 【Activated Carbon Filter】--High efficiency activated carbon can reduce odors, like smoke, pet odors. For best performance, friendly recommended filter be replaced once every 6-8 months. Keeping a healthy lifestyle with your family.