Specifications for Belt Size 635-5M-20 Cross References Numbers: 635-5M,  635-5M-20,  635-5M/20 Number of Teeth 127 *Length of Belt 635mm or ~25" Peak to Peak Distance Between Two Adjacent Belt Teeth 5mm or ~3/16" Width of Belt 20mm or ~13/16"

*Length of belt is the overall size of the belt's loop measured as if the belt were cut between two adjacent teeth and laid out on a flat surface.