The Canstop CS240NA front brake pads are designed for Audi vehicles, specifically the 1981-1983 5000S Quattro and the 1980-1983 5000S Turbo Diesel models. These brake pads are made of Non-asbestos Organic (NAO) material, offering quiet operation and are suitable for vintage cars. Manufactured in Canada, the set includes 4 brake pads and is interchangeably labeled as 79493YKNT and CS240. It is important to note that these brake pads come with a California Prop 65 Warning for Cancer and Reproductive Harm.