The NAPA 90-729 Mini In-Line Desiccant Air Filter Water Humidity Trap is a part designed to trap excess water and humidity in the air tools of cars and trucks. Made in the United States by NAPA, this filter ensures that only clean and dry air is circulated through the systems, preventing rust and corrosion. Its compact size and in-line design make it easy to install and provide efficient filtration for improved performance and longevity of the vehicle's components. Item weight is 2.9 ounces. Free shipping to the lower 48.