The Lau 60-5581-01 is a 4 blade condenser fan blade with a 18" diameter and a 27 degree pitch. The 60-5581-01 is a CW fan blade that requires an interchange hub. The Lau 60-5581-01 is made with high strenth aluminum blades with corrosion-resistant center spiders.
Typical applications for this fan blade are industrial air circulators, exhaust fan units, and large condensing units.
NOTE: Lau fan blades require an interchangable hub based on your motor's shaft diameter.