3/4" to 7/8" Engine Pulley Crank Shaft Sleeve Adapter Bushing & KeystockFeatures:This steel shaft sleeve adapts a crankshaft from 3/4' to 7/8' diameter, it comes with 3/16' step key.Alters motors with a different diameter shaft and alters pulleys for a different speed or belt.Reduces the necessity of buying a new motor or pulley to maintain existing components and speed/power requirements.Adapts larger wheel bores to smaller axles, works with Gas Engine Crank Shafts to enlarge the crank diameter to fit pulleys, gear boxes etc.One adapter and step key included; Made of quality material, high durability.Specification:Condition: 100% NewItem Name: Crank Shaft Sleeve AdapterMaterial: Aluminium alloyColor: As Pictures ShowSleeve inside diameter 3/4'Sleeve outside diameter 7/8'Sleeve length is about 3'Sleeve Keyway slot 3/16'Keystock Length: about 2'Package List:1 * Crank Shaft Sleeve Adapter1 * Keystock Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.