Replacement Propeller Hubless Propeller Dia 16 In CFM @ 0.000-In. SP 3050 @ 0.300-In. SP 2729 Min HP 1/2 Max RPM 1725 Pitch 27 Deg Counter Clockwise Rotation Number of Blades 4 Propeller Material Aluminum For Use With Air Conditioning Condensers Heat Pumps Heat Exchangers and Unit Heaters Requires Interchangeable Hex Hub 2A563 or 2A564 or 2A565