The Group Gasket 8.5MM for E61 Group is an essential replacement part that ensures a proper seal between the group head and portafilter of your espresso machine. Made from durable materials, this gasket provides a tight seal, maintaining the necessary pressure for optimal espresso extraction. It’s easy to install and helps to extend the life of your machine by preventing leaks and ensuring consistent performance. Regular replacement of the group gasket is crucial for maintaining the quality of your espresso shots.