Replacement Propeller, Hubless, Propeller Dia. (In.) 20 in, Bore Dia. (In.) -, CFM @ 0.000-In. SP 4,634 cfm, CFM @ 0.300-In. SP 3,687 cfm, Min. HP 1/2 hp, Max. RPM 1,140 RPM, Pitch (Deg.) 33 Degrees , CW Rotation, Number of Blades 3, Propeller Material...