The toughest rubber bush type prop in the world, complete with rubber hub. The modern squeeze casting gives finer grain size and minimal porosity that makes the propeller much stronger and easier to be repaired. *Computer designed progressive pitch blade geometry. *The universal blade design and interchangeable bush can lower the stock and maintenance cost. *No more rubber slipping problem! *DIY Rebushing. *Computer designed progressive pitch blade geometry. Solas0299-6680$85.99 (c) 2005. Soderbloom Manufacturing Inc. All Rights Reserved.