Nuova Simonelli Group Head Dispersion Plate - 5mm common-universal-simonelli-parts/program-mac-optima-solenoid-group Lay out and label the

Lay out and label the twelve included parts before disassembly so each new component goes back in the correct position — group head internals are easy to mix up during a full rebuild

even if it looks intact

1 ceramic filter

Mater XP110 Pressurestat – 1/4" Steam Boiler Pressure Switch

then step up to final size

Nuova Simonelli Group Head Dispersion Plate - 5mm common-universal-simonelli-parts/program-mac-optima-solenoid-group Lay out and label theThis is the thickest version. This is the preferred version in Europe. It allows for the use of taller (triple) baskets, while still only using 14 grams of coffee. There is a 3 mm as well as a 4 mm thick version available.