The ACME 845 is a CNC-machined 4-blade Nibral propeller designed for ski and wakeboard boats. With a 13.50? diameter and 16.00? pitch, it provides powerful hole shot, efficient power transfer, and consistent performance-ideal for both recreational and ballast-loaded setups. Diameter13.50″Pitch16.00″Cup.105″Hub Length03.125″BoreSplineBlades4RotationLeft