BRAND NEW PREMIUM WIDE  V BELT PULLEY Please confirm your old parts info before ordering.. We are glad to answer any questions you may have. THESE COME IN TO OUR SHOP AS CADMIUM OR BLACK IN COLOR WE SHIP WHAT WE HAVE IN STOCK AT THE TIME,  Delco Agricultural, Industrial, Marine Alternators Dimensions:  •  16-19mm Belt x 63mm OD x 17mm Bore Notes:  •  Conversion pulley with small OD to increase rotor rpm at slow engine speeds. Includes 84-2605 hex nut. Features:  •  100% New  - Replaces:  Original Reference Number 37940-7100