Features: Designed specifically for 121637ch car air purifiers, this composite filter effectively removes formaldehyde, smog, and other harmful substances, ensuring a cleaning and healthy in car environment. Featuring a multi layer filtration structure with initial, medium, and high efficiency layers, this filter provide long lasting performances without the need for professional tool during replacement. Ideal for private car owners, families with children or elderly members, and professional drivers like taxi and rideshare operators who prioritize maintaining high air quality within their vehicles. Perfect for daily commutes, family outings, and long road trips, this filter ensures freshness air circulation, reducing fatigue and discomfort while enhancing travel comfort and safety. The filter offering peaces of mind to environmentally sensitive individuals and allergy sufferers seeking best air purification. Specifications: Component:Composite Materials Size:Approx.15.2x2x12cm/5.98x0.79x4.72inch Weight:100g Package Includes: 1 Set Car Air Purifiers Filter note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.