Compatible design Specifically crafted for a range of coffee machines including Long, E16, Baistdu, and more, this sealing solution provides a precise fit for brewing performance. Heat resistant material Made from silicone that withstands temperature steam during coffee preparation, enhancing longevity and reliability. Easy installation tool included Includes a convenient installation tool for effortless setup and replacement without the need for professional assistance. Enhanced functionality Sealing rings play a crucial role in preventing steam leaks, supporting a consistent brewing process for a rich and flavorful coffee experience. Use scenarios Scenario 1: Replacing worn sealing rings on compatible machines (Long, E16, Baistdu, and others) to restore proper pressure and crema for a better extraction. Scenario 2: During temperature steam cycles, the silicone maintains integrity and reduces the risk of leaks, ensuring stable performance. Scenario 3: In home, office, or small cafe environments where quick, DIY maintenance is preferred, the included installation tool allows fast, tool setup without professional help.