Propeller, Replacement, Propeller Dia. (In.) 12 in, Bore Dia. (In.) 1/2 in, Number of Blades 3, Pitch (Deg.) 40 Degrees , Blade Material Aluminum, Keyway (In.) -, Rotation Clockwise Facing Discharge, Required Motor HP -, Required HP @ Higher RPM 1/8 hp, Required HP @ Lower RPM 1/250 hp, RPM Low 1,140 RPM, RPM High 1,725 RPM, Max. RPM 1,725 RPM, CFM @ 0.000-In. SP 2,335/1,543 cfm, CFM @ 0.125-In. SP 2,154/1,240 cfm, CFM @ 0.250-In. SP 1,953/920 cfm, CFM @ 0.375-In. SP -, CFM @ 0.500-In. SP -