The Milton Polycarbonate Micro Filter 1/2" NPT 1020 is a set of five high-quality filters designed for automotive use. Made by the trusted brand Milton, these filters are manufactured in the United States with a focus on precision and durability. Perfect for air tools and other automotive applications, these filters ensure clean and efficient air flow for optimal performance. Ideal for mechanics and DIY enthusiasts alike, this lot of five filters provides a reliable solution for maintaining your vehicle's air system. These boxes may show signs of sitting on a shelf, but have never been opened.