The RBX Interchangeable Hub seats to the propeller hub cavity in order to eliminate hub chatter and vibration while preventing spinning within the propeller. It features a one-piece rubber construction with anodized aluminum splines - no plastics to deteriorate. Hubs offer 10° deflection to reduce banging when shifting gears or hitting a submerged object. All RBX hubs are reusable if the propeller is damaged. Designed for use with the following: Evinrude/Johnson/BRP 60 and 70 HP (4-Stroke) (1998 and Newer) 13 tooth spline with 4-1/4" Gearcase, Suzuki DF 60 (4-Stroke) (1998-09), DF 70 (4-Stroke) 1998-08, DT 75-140 HP (1979-01) 13 tooth spline with 4-1/4" Gearcase.