Fits CMA manufactured machines that use a OEM chrome covered steam wand (such as the Astoria CK - CKXE, the Wega Mini Nova/Lyra and Rio models) with threads that have an outside diameter of 10mm, are 1.3mm apart and no more than 7.8mm in overall length/height. We have yet to see this fit on any wand other than the Astoria Compact.