Replacement Propeller, Propeller Dia. (In.) 20 in, CFM @ 0.000-In. SP 3,540 cfm, CFM @ 0.300-In. SP 3,321 cfm, Min. HP 1/3 hp, Max. RPM 1,140 RPM, Pitch (Deg.) 26 Degrees , CW Rotation, Number of Blades 4, Propeller Material Aluminum, Galvalume...