A belt is a loop of flexible material used to link two or more rotating shafts mechanically, most often parallel. Belts may be used as a source of motion, to transmit power efficiently or to track relative movement. Belts are looped over pulleys and may have a twist between the pulleys, and the shafts need not be parallel. Features. GST3V Crown Belt. Made with high quality materialSpecifications. Length 6.13. Width 16.06. Height 0.38