Fitment:Compatible for Most Chevy and Ford Water Pumps, Fits 5/8" & 3/4" Center Shaft on Water Pump.
Made of high quality steel, making the spacer rustproof, anticorrosion and durable.
These shims are designed to properly align the pulleys so the belts will stay put.Pulley alignment is very important, especially when the engine is run at 6000 RPM (revolutions per minute) and above.
Direct installation and replacement between water pump and pulley.