The ACME 540 is a CNC-machined 3-blade Nibral propeller engineered for wake and ski boats seeking blended acceleration and pull. With a 13.00″ diameter and 12.00″ pitch, it provides reliable all-around performance. Diameter 13.00″ Pitch 12.00″ Cup .080″ Hub Length 02.750″ Bore 1.00″ Blades 3 Rotation Right