This is the bushing used on the pulley for the John Deere Model G. This will fit the standard crankshaft journal for this bushing. Our bushing ID is 3.008-3.010". We use 660 cast bronze and is identical to the original bushing. We also offer an undersize bushing for this application if your tractor crankshaft has been ground to a smaller OD. See: GP-F181US.