Propeller, Replacement, Propeller Dia. (In.) 30 in, Bore Dia. (In.) 1/2 in, Number of Blades 3, Pitch (Deg.) 10 Degrees , Blade Material Aluminum, Keyway (In.) -, Rotation Clockwise Facing Discharge, Required Motor HP -, Required HP @ Higher RPM -, Required HP @ Lower RPM 1/6 hp, RPM Low 1,140 RPM, RPM High -, Max. RPM 1,140 RPM, CFM @ 0.000-In. SP 2,704 cfm, CFM @ 0.125-In. SP 2,011 cfm, CFM @ 0.250-In. SP 1,697 cfm, CFM @ 0.375-In. SP -, CFM @ 0.500-In. SP -, Blade Height (In.) 2 7/16 in