GREAT-VALUE FILTER KIT - One replacement set includes 8 pieces of disposable ultra-fine filters and 4 pieces of reusable filter supplies by Everness. PROVIDE CLEANEST AIR - Provide 8PCS ultra-fine filters to effectively block out fine and small particles, 4PCS reusable filters to help trap out large particles. Using together to have freshest air. BENEFICIAL INVESTMENT - This filter kit is designed so as to provide you with fresh air and keep dust away from your device, which can enable your device to be used effectively for many . NO HASSLE - Please note the white filter material is designed to permanently attached to the filter frame and can't be detached. No hassle with assembly or replacing at all. EASY TO INSTALL - Simply combine ultra-fine filter with reusable filter and insert them both into the air inlet of device. Easy to install and use and easy to provide you and your loved one with fresh air. Color: Gray & Blue Material: Plastic + Cotton Package Contents: 8PCS Disposable Ultra Fine Filters 4PCS Reusable Pollen Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.