Features: 1.Wide Use: The gas engine pulley crank shaft adapter can adapt to a wide range of gas engine crankshaft sizes and pulley specifications, and is widely used in different types of vehicles. 2.Improve Engine Performance: The pulley crankshaft adapter allows for smoother power transfer between the crankshaft and pulley, reducing friction and wear, and improving engine performance and efficiency. 3.Easy to Replace: Without replacing the original pulley and crankshaft, the adapter can be installed directly on the crankshaft, saving replacement cost and time. 4.Cost Saving: Compared with replacing the original pulley and crankshaft, the cost of the pulley crankshaft sleeve adapter is lower, which can effectively reduce maintenance costs, and its longer service life makes it more economical and practical. 5.High Durability: Made of high grade metal material, it has excellent wear resistance resistance, as well as high strength and light weight, which can be used for a long time without loss. Specification: Item Type: Gas Engine Pulley Crank Shaft Sleeve_x000D_ Material: Metal_x000D_ Sleeve Inner Diameter: 3/4 inch (19mm)_x000D_ Sleeve Outer Diameter: 1 inch (25mm)_x000D_ Sleeve Keyway: 1/4 inch (6.35 mm)_x000D_ Step Key length: Approx. 46 mm/1.8in_x000D_ Sleeve Adapter Length: Approx. 57 mm/2.2in