The Grainger 14J781 is a 14-inch diameter, 7-blade, plastic fan blade suitable for ventilation fans. It has a pitch of 30 degrees and is constructed of injection molded thermoplastic. The blade measures 14 inches from tip to tip, with a 1 inch bore diameter and 1/2 inch keyway. It can be used as a replacement blade for ventilation fans up to 1 HP at 1075 RPM. The thermoplastic material offers corrosion resistance.