The Bard HVAC 5151-045BX Condenser Fan Blade is an essential component meant for HVAC systems which finds its application in the outside condensing units. This particular fan blade measures 20 inches in bore diameter and has four blades to pull ambient air across the condenser coils in order to remove heat from the refrigerant. #BardHvac #5151-045Bx #FanBlade #BardHvacparts #PartsH... https://www.partshnc.com/5151-045bx-bard-hvac-20-fan-blade-cd-4-blade