Upgrade your coffee grinding experience with this premium conical burr grinder replacement set designed specifically for Breville 870/878/880/860/840/810/450/500 espresso machines (Pre 1926 PDC models). These precision-engineered burrs ensure consistent grind size for optimal flavor extraction. The conical design efficiently processes coffee beans while maintaining their essential oils and aromatic compounds. This replacement set offers an excellent solution for maintaining your grinder's performance when the original burrs wear down. Easy to install and align, these burrs will help restore your grinder to peak efficiency. Compatible with select Breville espresso machine models manufactured before 1926 PDC. Keep your coffee ritual going strong with this essential replacement part that delivers the perfect grind for your daily brew.