Pirelli & C. S.p.A. is an Italian multinational tyre manufacturer based in the city of Milan, Italy. The company, which has been listed on the Borsa Italiana since 1922, is the 5th-largest tyre manufacturer, and is focused on the consumer production of tyres for cars, motorcycles and bicycles. It is present in Europe, the Asia-Pacific, Latin America, North America, and the post-Soviet states, operating commercially in over 160 countries. It has 19 manufacturing sites, across 13 countries, and a network of around 14,600 distributors and retailers. In 2015, China National Chemical Corp. Ltd. took controlling interest of Pirelli; with the Chinese state-owned company agreeing to maintain the tyre company's ownership structure until 2023. Pirelli is the solo provider of tyres for F1, and they have six different hardnesses. In each race, three are chosen, depending on the track, and at least 2 different sets have to be used by a driver in each race. Despite easily being able to manufacture tyres that could last a whole race, pit stop is one of the most entertaining parts of F1, and so tyres that will wear out are created. Wikipedia