The espresso machine brand Vibiemme uses a variety of portafilter gaskets for their espresso machines. They can basically be divided into 2 categories, the spring lever operated brewing groups and the solenoid valve operated ones. For the gaskets is no difference between commercial and domestic espresso machines.
The smallest size of portafilter gasket is the one used on the lever operated brewing groups, which can be found on the VBM Replica. This portafilter gasket has a outer diameter of 65,5mm and a inner diameter of 55,5mm.
The most common size of portafilter gasket, is the version with a outer diameter of 73mm and a inner diameter of 57mm. This gasket is available in a variety of thicknesses. You can find this model of portafilter gasket on VBM espresso machines like the Vibiemme Replica, Vibiemme Lollo, Vibiemme Chimaera, Vibiemme Domobar, Vibiemme Domobar super and the Vibiemme Silver. So basically all models of Vibiemme which have a solenoid valve operated group or a manual e61 style of group.
