This little guy is a replacement Boiler O-ring seal made just for your 9Barista espresso machine. Under regular use, the seals that came with your machine should last a really long time, like, years and years. But, you know, stuff happens. Maybe you drop it, or your dog thinks it’s a toy. Whatever the case, if one gets damaged, you’ll need to swap it out.

The seal is made of silicone rubber – tough, resilient, and ready to get back to brewing. It’s got an internal diameter of 55mm and a cross-section of 2mm.