The Grainger 14J783 is a 14-inch diameter, 7-blade, cast aluminum fan blade. It has a 3/4-inch bore and is designed for direct drive applications. The blade pitch is set at 27 degrees. This fan blade is well-suited for use in air circulation and ventilation systems. With its sturdy aluminum construction, it provides good airflow while maintaining durability. The standard blade style and common size make this a versatile replacement blade for many ventilation fans.