55 mm Precision Group Head Screen - Gaggia Brand_Giemme then thread the cap into

then thread the cap into the valve

so it's worth checking here first before ordering a different size

Kees van der Westen

and thermal performance

55 mm Precision Group Head Screen - Gaggia Brand_Giemme then thread the cap intoIMS Precision 55mm Group Head Shower Screen Gaggia An IMS Precision integrated membrane shower screen, 55 mm diameter with 200 m filtering capacity, designed for the standard screen size used across Gaggia's commercial and domestic lineup, commercial grade engineering in a size that also fits many home units. SPECIFICATIONS 55 mm diameter 200 m filtering capacity, integrated membrane design Full specs at IMS Filtri COMPATIBILITY Fits: Gaggia