[COMPATIBLE WITH MODERN E61 HEADS] Our silicone O-ring kit is specifically designed to fit most E61 group heads, making it a great addition for those wanting to enhance their espresso-making journey. [TIGHT SEALING PERFORMANCE] The soft silicone construction provides a robust seal that effectively avoid moisture escape while minimizing the need for frequent replacements. [LEAK PROTECTION ] Once installed correctly, the silicone steam O-rings securely stay in place to avoid any water leaks, ensuring you achieve the best brewing conditions possible. [EASY TO HANDLE] Designed with user convenience in mind, these gaskets allow for easy installation and removal, making upkeep of your espresso machine hassle. Part Name:Seal O-Rings Size:7.1x7.1x0.84cm Color: Red & Blue Material: Silicone Package Contents: 2 * Silicone Seal Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.