Quantity: 2 Diameter: 34 Pitch: 30 Rotation 1RH 1LH Blade: 4 Style: STQ Service: Motor Yacht EAR: .75 Material: Nibral Bore: 3" Relief/Undercut : yes Taper 1:16 Hub Length 9" Key Way : 5/16 x 3/4 ins Puller holes: yes