Standard model is designed for engines up to 100 hp, 18"-52" or 35"-70" pitch range and 48"-72". The Quick Adjust System IVO Props allow you to adjust the pitch on the ground quickly turning the screw adjuster in the center of the prop. The super cams are installed on the torsional rod. Each super cam fits into the groove in the screw adjuster. Turning the screw adjuster causes each cam to rotate and turn the torsional rod, thereby twisting the blade and changing the pitch. Black.