Please view the photos of the products on the left (view 1 & view 2). These beautiful Chrome Metal Polished "Euro" Style knobs just arrived and are designed to fit our Model One and discontinued Classic Sound radio shafts perfectly! These knobs are 23mm in diameter (Front) and 28mm (Rear) Each knob is highly detailed and comes with a highly polished chrome front knob and rear knob (2 front & 2 rear) Please note that these are designed for our Model One shafts (which are a "split" type and may fit other aftermarket " shaft " style radios that have a front "split" type of shaft... , but were designed for our current Model One, second generation Model One, and Classic Sound radio control shafts. These knobs are perfect for all years of Foreign and Domestic classic cars, perfect for older VW Bugs, BMW's Porsches, Corvettes, Japanese cars. These knobs are very low profile and look great in any car! (Price includes USPS postage in the US), please call us for international orders.