The ACME 3199 is a CNC machined 4 blade Nibral propeller built for wake and ski boats. With a 15.00″ diameter and 16.25″ pitch, it delivers strong acceleration, efficient top?end hold, and smooth throttle response. Diameter: 15.00″ Pitch: 16.25″ Cup: .120″ Hub Length: 02.750″ Bore: 1.125″ Blades: 4 Rotation: Left