Specifications for Belt Size 400-5M-12 Cross References Numbers: 400-5M,  400-5M-12,  400-5M/12 Number of Teeth 80 *Length of Belt 400mm or ~15-11/16" Peak to Peak Distance Between Two Adjacent Belt Teeth 5mm or ~3/16" Width of Belt 12mm or ~7/16"

*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.