Raised radiator filler neck manufactured in mild steel, suitable as a replacement for a damaged filler neck or for use on a new/custom radiator build. The cap seat measures 56mm outside diameter at the largest point where the cap twists and locks (see photos for reference). The tube outlet is 28mm OD and the overall height is 70mm. Finish / preparation: This part is supplied unfinished and may show signs of surface rust from storage/handling. This is normal for bare mild steel. Please clean and prep the surfaces prior to welding, brazing, or soldering. Compatibility: Please check your required dimensions before purchase to ensure the cap type and hose/tube size match your application. Returns: 30-day returns accepted. Buyer pays return postage unless otherwi.