This frother is for the KitchenAid® Semi-Automatic Espresso Machine  It makes wonderful, thick, smooth, lasting froth.   What did I do without it?  It makes the biggest difference.  What is better than programing froth  perfectly to your particular taste.  If you have invested in an expresso machine, it is not complete without the frother.  You will probably notice people stopping by for “coffee” much more often.