61 mm, Face Width 17 mm, Features Self-Tracking Design, Number of Flanges 0, Overall Width 17 mm, Pulley Construction Plain.24 mm, Pitch 8 mm, Pitch Diameter 142.Gearbelt Pulley, For Belt Series SilentSync, For Belt Width 16 mm, For Bushing Size SDS, Material Steel, Number of Teeth 56, Outside Diameter 141.