Specifications for Belt Size 387-3M-12
Cross References Numbers:
387-3M,  387-3M-12,  387-3M/12

Number of Teeth 129
*Length of Belt 387mm or ~15-1/8"
Peak to Peak Distance Between Two Adjacent Belt Teeth 3mm or ~1/8"
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.