Effective length: 52" or 132.1cm, top width: 29/64" or 11.5mm Mercruiser stern drive 57-33170, 57-37619t, 57-33170q, 57-37619, 57-37619q, OMC stern drive 912714, mallory 9-55001 High strength synthetic cords resist shock load Their low stretch properties assure uniform performance over the life of the belt Special rubber Compound section assures smooth and even transfer of load forces to the cords