Replacement 8 tooth transmission sprocket for Exmark walk behinds, code 1-323112. We sell replacement blades, belts, wheels and more for most brands of finish mowers. If you don't see the parts you need listed please contact us we would love to earn your business. We are listing new items frequently so please check our store often. Part Numbers: 1-323112 We stock a wide variety of replacement parts for Agricultural Equipment please contact us if you have any questions or if you would like more information.