Specifications: Provide you with fresh air: it is more delicate and durable than ordinary filter membranes, and can effectively prevent fine dust, dirt and pollen from entering the air conditioner. Get natural wind at any time to keep indoor air fresh and provide you with a comfortable environment. Protect your equipment: folding filters will restrict airflow and damage your HVAC equipment. Allows increased airflow to reduce equipment running time, maintenance and wear. Suitable for household air conditioners, purifiers, range hoods. Smooth surface, creep resistance, wear resistance, good electrical insulation. Installed on the air-conditioning shelf, effectively intercept PM2.5, the effect reaches 80%, effectively prevent smog. Equipped with double-sided tape. Instruction: 1. Remove the air conditioning filter. 2. Clean dust. 3. Paste both sides on the four corners of the filter. 4. Paste the dustproof film on it. 5. Cut according to the size of the filter. 6. Install the filter. 7. Cover the air conditioning board. Item Name: Air Conditioning Filter Material: Non-woven Fabric Quantity: 4Pcs/2 Boxes (2Pcs/1 Box) Features: Anti-dust, Cuttable, Air Purification, Dust Proof Size: 35cm x 23cm/13.7" x 9.06" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 4 x Air Conditioning Filter