Replacement Propeller, Industrial/Commercial Heavy-Duty, Propeller Dia. (In.) 30 in, Number of Blades 6, Pitch (Deg.) 38 Degrees , Blade Material Galvanized, Rotation CW, Required Motor HP 3-1/4, Required HP @ Higher RPM 3 1/4 hp, Required HP @ Lower RPM 1 1/2 hp, RPM Low 720 RPM, RPM High 1,140 RPM, Max. RPM 1140, CFM @ 0.000-In. SP 16,701, CFM @ 0.125-In. SP 16,164, CFM @ 0.250-In. SP 15,547, CFM @ 0.375-In. SP 14,831 cfm, CFM @ 0.500-In. SP 14,064 cfm, Blade Height (In.) 3 5/8 in