ITEM NAME:7/8" to 1" Crankshaft Sleeve Adapter Bushing Converter Pulley Bore Reducer Description: 7/8 to 1 inch shaft adapter The adapter is approximately 3 inches long A steel shaft adapter to convert a crankshaft from 7/8 to 1 inch shaft. Includes the step key needed to go from the 1/4 in key way to the 3/16 key way. A very handy way to use your old pulley on a new engine. Specification: Material: stainless steel Size Chart: Size:75x25mm Package Includes: 1x 7/8 to 1 inch shaft adapter Note: The color may have different as the difference display, pls understand. Please allow 1-3mm error due to hand test. Thank you for your understanding and finding this item. Enjoy your shopping timeï ¼ .A very handy way to use your old pulley on a new engine. Includes the step key needed to go from the 1/4 in key way to the 3/16 key way.