Replacement Propeller, Propeller Dia. (In.) 24 in, Bore Dia. (In.) 1/2 in, CFM @ 0.000-In. SP -, CFM @ 0.150-In. SP 4,261 cfm, CFM @ 0.300-In. SP -, Min. HP 1/6 hp, Max. RPM 1,100 RPM, Pitch (Deg.) 22 Degrees , CCW Rotation, Number of Blades 2, Propeller Material Aluminum, Galvanized Spiders, For Use With 13 Seer Air Conditioning Condensers, Heat Exchangers and Unit Heaters, Heat Pumps, Requires -