Check the listing for details. Single 7/8" to 1" Engine Pulley Crank Shaft Sleeve Adapter w/Step Key Universal. Condition: New. Listed at 11.99 USD. Function:7/8" 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: 7/8" to 1" Crank Shaft Sleeve AdapterMaterial: MetalColor: Silver ToneSize: 2.6x7.6cm / 1.02"x2.99"(D*L)Compatibility:Universal design for most vehicles.Please Attention:Please confirm the model, displacement, and year of your car before purchasing.Ship Content:1 Pc - Engine Pulley Crank Shaft Sleeve Adapter2 Pcs - Step Key.