The ACME 480 is a CNC-machined 4-blade Nibral propeller built for precision acceleration and stable power in ski and wake boats. With a 13.00″ diameter and 12.50″ pitch, it delivers smooth, confident performance. Diameter 13.00″ Pitch 12.50″ Cup .105″ Hub Length 02.750″ Bore 1.00″ Blades 4 Rotation Right