Make a change in your espresso machine maintenance with the Caffewerks E61 Gasket. Made from resilient silicon, these replacement gaskets offer a significantly longer life and easier cleaning than classic rubber group gaskets. Upsized to a slightly thicker 8.5mm size, these gaskets are an ideal pick for the Rocket Espresso Boxer or older, worn portafilters that need a tighter fit. Compatible with many E61 machines, including Rocket Espresso and Diletta machines.