These windshields are for restoring your 1936-1948 Flathead, Knucklehead or Panhead. They were modeled directly from actual vintage windshields that National Cycle manufactured beginning in 1937. Windshields come complete with mounting hardware exactly like the originals. Original period windshields were made from Pyralin plastic, which was somewhat flexible and thus required a beaded edge as well as a steel reinforcing ring. These new reproductions are made from virtually unbreakable polycarbonate with the upper section having National Cycle’s exclusive Quantum hard coating for the world’s best scratch resistance and protected by a 3-Year Warranty against breakage.