A replacement o-ring for most steam tips that are compatible with Teflon lined no-burn steam wands. It is also compatible with the Quick Mill Silvano produced after 2020 - between the arm and tip.
Inner: 5mm Outer: 7mm
If your Silvano was purchased prior to 2020 you will need part# OR2031. To confirm which one is compatible with your machine please send a photo of your steam arm to email@example.com