Toro 16.5 Inch OEM Medium Flow blade pack. (6) Medium Flow blades. Medium Flow mower straight edge, standard discharge blade. These blades have slight upward angle on the edges. Great blades for use when horsepower is a concern. Produce medium Flow but requires less horsepower than Hi-Flow blades. This Toro blade has multiple applications. Be sure to verify model and serial number to ensure the correct part.