The burr assembly upper and lower for selected espresso machines. Not suitable for old machines with non adjustable burrs and Etzinger burrs using 6-point burrs. High quality stainless steel conical burrs designed to minimize heat during grinding, preserving the coffee bean ft. s essential oils. This process ensures even grinding for optimal flavor and aroma. Direct replacement part that fits seamlessly into compatible grinder units. Specifically designed for Sage/Breville Coffee Machines 870, 878, 880, 860, 840, 810, 450, 500, ensuring optimal performance and compatibility. Easy installation as a direct replacement part simplifies maintenance for home baristas and service technicians alike. The burr assembly fits seamlessly into compatible Breville grinder units without modification, allowing you to restore grinding performance quickly. Regular burr replacement is an important part of espresso machine maintenance, ensuring continued grind quality as original burrs naturally wear over time.