Replacement Propeller, Propeller Dia. (In.) 18 in, CFM @ 0.000-In. SP 2,730 cfm, CFM @ 0.300-In. SP 1,700 cfm, Min. HP 1/4 hp, Max. RPM 1,140 RPM, Pitch (Deg.) 30 Degrees , CW Rotation, Number of Blades 4, Propeller Material Aluminum, Galvalume...