The ACME 912 is a CNC-machined 3-blade Nibral propeller built for direct drive ski and crossover boats. With a 13.00? diameter and 10.50? pitch, it provides strong acceleration, tight tracking, and efficient handling-well-suited for watersports and performance boating. Diameter13.00″Pitch10.50″Cup.080″Hub Length02.750″Bore1.00″Blades3RotationRight