Among the Mignon, the Specialità is the version with the largest grinding discs: 55mm diameter. The Perfetto and the Silenzio are then at 50mm (the same as the predecessor; the Mignon MCI). For larger grinding discs on the Eureka machines, you would have to switch to the Atom (60 mm on the Standard). https://www.galaxus.ch/de/s2/product/eureka-atom-kaffeemuehle-7950084

this question was addressed here: https://www.galaxus.ch/de/s2/product/lelit-pl-72-william-kaffeemuehle-7041410. hope this helps;)