Rancilio 8mm Silicone Group Head Gasket
Unlike regular gaskets that are made from rubber these do not have any smell or taste whatsoever, and are easy to change since they will not bake rock hard like rubber does. If you have ever struggled to change an old gasket you cannot help but notice the awful smell and the black soot that comes off the rubber. And that is what you are potentially consuming with each drink.
74 x 58 x 8.4mm.
Also fits the Promac and Laranzato Club models.