OEM group gasket from Kees van der Westen Espressonistic Works B.V.
This gasket is 8mm thick and is used on the Mirage, Spirit and Speedster machines. Please consult a parts manual to ensure this is the correct gasket for your machine.
Group gaskets should be replaced regularly. While it does depend upon usage, most manufacturers recommend every 3 to 6 months to prevent leaks. Replacing your gaskets often also makes the job a breeze.