Lenzilumab has to be diluted before use.
In point of reference, after Catalent expanded their Bloomington plant, they now have the capacity to produce 80M vials of product per year. They also have a plant in Madison.
In addition, Ajinomoto can produce the product.
I've seen one estimate here that one vial can produce 5 treatments, as I recall.
But I don't think we know that a treatment course of 1800mg refers to pure product, or to the diluted product. I would assume the latter.