Check the listing for details. Universal Piece of 1 Engine Pulley Crank Shaft Sleeve Adapter 3/4" to 1". Condition: New. Listed at 14.62 USD. Function:3/4" to 1" Crank Sleeve Adapter with Step KeyAdapts larger wheel bores to smaller axles.Alters motors with a different diameter shaft, 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.Works with Gas Engine Crank Shafts to enlarge the crank diameter to fit pulleys, gearboxes, etc.Product Dimension:Product Name: 3/4" to 1" Crank Shaft Sleeve AdapterMaterial: MetalColor: Silver ToneSize: 2.6x5.8cm / 1.02"x2.28"(D*L)Compatibility:Universal design for most vehicles.Please Attention:Please confirm the model, displacement, and year of your car before purchasing. Content:1 Pc - Engine Pulley Crank Shaft Sleeve Adapter2 Pcs - Step Key.