Amazon.com: COLIBROX 1'- 1 1/8' Shaft Adapter
Shaft Adapter Sleeve Predator with Key Pulley A steel shaft adapter to convert a crankshaft from 1 inch shaft to 1 1/8 inch shaft. The adapter is approximately 3 inches long and includes the special key needed to go from the key way in your shaft, THOUGH the adapter and in to the pulley.
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