Features: High Quality: Made from high-quality raw materials and advanced nanotechnology, this filter provides fresh and healthy airflow, supporting the well-being of your family. EASY TO INSTALL: Specially designed for USB air coolers, this replacement filter requires no special tools and can be installed in approximately 2 minutes, quickly refreshing your air cooler. SAVE TIME & MONEY: Avoid replacing the entire unit when your air cooler loses efficiency—simply change the filter and restore performance. FUNCTION: Effectively captures airborne impurities, dust, and particles to keep your air cooler clean and functioning properly. Offers fast and efficient absorption. REPLACEMENT FREQUENCY: It is recommended to replace the filter every 2 to 3 months to maintain optimal performance and prevent bacterial buildup. SPECIFICATIONS: Material: Plastic + Non-woven Fabric Quantity: 28 Pieces Filter Size: 12 x 11 x 12 cm / 4.72 x 4.33 x 4.72 inches PACKAGE INCLUDES: 28 x Filter NOTE: Please allow 1–2 cm variation due to manual measurement. Ensure you are comfortable with this before ordering. Due to differences in monitor displays, the actual color of the item may vary slightly from the images shown.