Propeller, Replacement, Propeller Dia. (In.) 30 in, Bore Dia. (In.) 5/8 in, Number of Blades 3, Pitch (Deg.) 24 Degrees , Blade Material Aluminum, Keyway (In.) 3/16 in W x 3/32 in H, Rotation Clockwise Facing Discharge, Required Motor HP -, Required HP @ Higher RPM 3/4 hp, RPM Low -, RPM High 1,075 RPM, Max. RPM 1,140 RPM, CFM @ 0.000-In. SP 7,657 cfm, CFM @ 0.125-In. SP 6,918 cfm, CFM @ 0.250-In. SP 6,200 cfm, CFM @ 0.375-In. SP -, CFM @ 0.500-In. SP -, Blade Height (In.) 5 in