How to Verify Compatibility? — Visual Inspection Is Key!Important Compatibility Information (Please Read Carefully): This conical burr assembly is a direct replacement for Sage/Breville models 870/878/880/860/840/810/450/500. This product features a five-core grinding head. Before purchasing this conical burr assembly, verify your machine's grinding head has five cores to ensure compatibility. Note: This burr is not compatible with all five-point machines. Prior to purchase, confirm your portafilter basket is an adjustable type. Our burr discs are only compatible with adjustable portafilters, typically marked with a red dot. If you remain uncertain, please contact our customer service before purchasing and send a clear photo of your existing burr disc for verification!