It depends on whether the 2-phase lift serum is used locally or as all over face serum. Depending on requirements, half to four pump strokes are used. There are always 20ml in the product. You can dose a smaller or larger portion with one pump stroke. Therefore, the number of pumping strokes cannot be defined in a certain number. Depending on the quantity you dose, the quantity is about 50 to 90 pump strokes.