The L02048706 is a galvanized single inlet blower wheel with a diameter of 8-1/2" and a 1/2" bore by Packard. This galvanized single inlet blower wheel s rotation is determined by looking at the plate (back side of the wheel). The RBW80120 Revcor single inlet blower wheel from Packard can act as a substitute. Replaces: Grainger 4GMC4