The Grainger 14L620 is a 14-inch diameter, 6-blade, 20-inch long plastic fan blade suitable for ventilation, cooling, and air circulation applications. It features reinforced polypropylene construction with a black finish and fits 5/8-inch or 3/4-inch diameter fan motor shafts. The maximum fan speed is 1650 RPM. This fan blade set improves airflow efficiency over traditional sheet metal fan blades. The modular design allows replacing individual blades instead of the entire set. It can be used with fan motors up to 1/3 HP in industrial, commercial, and residential settings. The Grainger 14L620 comes as a set of 6 fan blades.