Timing pulleys and belts, these are available in various tooth forms like T, AT, GT, HTD and more. Like chains and sprockets they are able to transmit motion and power over a large centre disatnce. The benifit of pulleys and belts is the reduction in noise and no lubrication needed that is a benifit over chain. We can supply as the web site but as a manufacturer of pulleys we are also able to make to order and design. See more on us at ondrives.com -