Features: High Quality: Made from high-quality raw materials and utilizing advanced nanotechnology, this filter delivers fresh and healthy airflow, helping to support your family's well-being. EASY TO INSTALL: Specially designed for USB air coolers, this replacement filter requires no special tools and can be installed in approximately 2 minutes, providing a refreshed cooling experience. SAVE TIME & MONEY: Extend the life of your air cooler by simply replacing the filter element, avoiding the need for a full unit replacement. FUNCTION: Effectively captures airborne impurities, dust, and particles to maintain a clean air cooler and ensure efficient performance. Offers fast and efficient absorption. REPLACEMENT FREQUENCY: It is recommended to replace the filter every 2–3 months to maintain optimal performance and hygiene. 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 product color may vary slightly from images shown.