Fits These Izzo Models: Alex Duetto 2 Alex Duetto 3 Alex Duetto 4 Alex Duetto EVOs **NOTE**: If you have an older Alex model without Chrome capped knobs, these Barista Style knobs will only fit on the "New Style" knobs shown in the picture in our listing. If your knobs matches the "Old Style" design, these knobs will not fit. Please inquire if you have another machine with similar knobs. We can custom build them for most prosumer espresso machines. And in many cases cost less than this particular set.