Vintage used 1920’s 1930’s radiator cap. NOT SURE WHAT IT CAME OFF OF ORIGINALLY. CHROME HAS SOME LIGHT PITTING AND SCRATCHES. Measurements included in pictures. Please read the WHOLE description and all the pictures. Feel free to ask questions, I will respond ASAP. All parts are used unless stated otherwise. Used parts are not perfect and need restoration, repair or rebuild. We do our best to take lots of clear pictures and describe any defects, rust or damage. The pictures are a large part of the description. We will respond ASAP and are always happy to help. We ALWAYS do whatever it takes to make things right and provide 5 star service. Thank you for your interest??