Please view the photos of the products on the left (view 1 & view 2). These beautiful Chrome Metal Polished knobs just arrived and are designed to fit our Model One and discontinued Classic Sound radio shafts perfectly! These knobs are 32mm in diameter (Front) and 36mm (Rear) The Era correct look and feel comes standard on some of our Model One vehicle specific kits and now are available for purchase separately! 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" style shaft and may fit other aftermarket " shaft " style that have "split" front shafts---, but were designed for our current Model One, second generation Model One, and Classic Sound radio control shafts. Note, this listing also shows all knobs, you can select from any shown on the right for your needs.( Note price includes US Postage), call us directly if you're international.