Necessary replacement part for Breville coffee makers, helps create a tight and secure seal to prevent moisture from escaping. Safe, durable, and resistant to cracking or leaking. Designed for specific Breville models using a 54mm portafilter, including 878, 870, 870XL, 860, 840, 810, 500, and 450, and also compatible with other espresso machines requiring a 58mm diameter gasket, such as Sage models 500, 870, 875, 880, 810, and 878. Made from food-grade silicone, BPA-free, easy to remove and install. Silicone group head gaskets are essential for maintaining optimal performance in espresso machines. Regular replacement helps ensure consistent results. Ideal for coffee enthusiasts who want to keep a spare on hand. Package includes: 2 pcs 58mm Breville espresso machine brew group head seal gasket.