Duramax water-lubricated rubber bearings are trusted by more marine industry professionals than any others. Their precision designed, specially formulated nitrile rubber is molded to fit the shaft in accordance with U.S. Navy Buships clearances.  Duramax bearings possess inherent vibration-dampening qualities and are non-polluting. Grit particles and other abrasives wash into grooves and are flushed away, protecting the shaft and prolonging bearing life.