Maintain peak performance of your espresso machine with the San Marco Group Seal, which is essential for ensuring a tight seal between the portafilter and group head. This crucial component prevents leaks and ensures consistent pressure during extraction. Regular replacement of the group seal helps prolong the life of your espresso machine. San Marco Group Seal Features Leak Prevention - Promotes a secure seal to prevent leaks during espresso extraction. Easy Installation - Facilitates quick and hassle-free replacement. Consistent Pressure - Maintains stable pressure for optimal flavour extraction. Anti-Deformation - Maintains its shape and elasticity even after prolonged use. Food-Grade Material - Safe for use in food and beverage preparation. This Product Includes 1 x San Marco Group Seal Specifications Material Silicone External Diameter 64mm Internal Diameter 52.5mm Thickness 5.5mm 6.5mm Compatibility San Marco Espresso Machines Origin Country Italy