Replacement Propeller Industrial/Commercial Heavy-Duty Propeller Dia (In.) 48 in Number of Blades 6 Pitch (Deg.) 38 Degrees Blade Material Galvanized Rotation CW Required Motor HP 8-3/4 Required HP @ Higher RPM 8 3/4 hp Required HP @ Lower RPM 3 1/4 hp RPM Low 500 RPM RPM High 700 RPM Max RPM 700 CFM @ 0.000-In. SP 43 400 CFM @ 0.125-In. SP 41 957 CFM @ 0.250-In. SP 40 294 CFM @ 0.375-In. SP 38 364 cfm CFM @ 0.500-In. SP 36 102 cfm Blade Height (In.) 5 3/4 in