- Specifically designed for Breville machines, this wool ring seal is Exclusively developed for Breville models 870, 878 and 880. It provides a secure fit and helps deliver optimal performance in your espresso machine. - Protective shock absorber, made from durable wool, the seal acts as a cushion to shield internal parts from wear during operation. - Every brew stays clean. The wool ring effectively blocks coffee grounds from entering the machine, ensuring each cup is clean and flavorful. - Installation key included. Each kit comes with a simple installation key for quick replacement of old seals, without the need for professional tools or services. Use scenarios - When upgrading or replacing old seals in Breville 870, 878 or 880 to restore fit and performance. - In high frequency espresso routines at home or small offices, to ensure reliable sealing and consistently clean brews. - As part of routine maintenance during service of Breville 870, 878 or 880 machines.