Mazzer Mini Electronic Push Button Cap O-ring common-universal-simonelli-parts/progr The M4 hole is there

The M4 hole is there for the shaft spring guide pin

Replaces: Rancilio #20121506

Rancilio MD-50 Doser Lens

and copper gasket needed to fully reseal the AV function

Mazzer Mini Electronic Push Button Cap O-ring common-universal-simonelli-parts/progr The M4 hole is thereMazzer Mini Electronic Push Button Cap O Ring NBR o ring that seals the push button cap on the Mazzer Mini Electronic grinder. SPECIFICATIONS Standard: OR 02450 Material: NBR rubber Size: 1. 78mm thick x 114. 02mm ID COMPATIBILITY Fits: Mazzer Mini Electronic push button cap INSTALLATION Simple o ring swap once the cap is removed. PRO TIPS If the push button cap feels loose or lets grounds dust creep in around its edge, this o ring, not the cap