Specifications for Belt Size 620-5M-15 Cross References Numbers: 620-5M,  620-5M-15,  620-5M/15 Number of Teeth 124 *Length of Belt 620mm or ~24-7/16" Peak to Peak Distance Between Two Adjacent Belt Teeth 5mm or ~3/16" Width of Belt 15mm or ~9/16"

*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.