The ACME 3861 is a CNC-machined 4-blade Nibral propeller built for larger ski and wakeboard boats. With a 17.00″ diameter and 14.00″ pitch, it delivers strong midrange pull and smooth cruising performance. Diameter: 17.00″ Pitch: 14.00″ Cup: .150″ Hub Length: 03.750″ Bore: 1.25″ Blades: 4 Rotation: Left