Upper Burr Carrier - Fiorenzato F4, 58 mm New Ring OEM upper burr carrier ("new ring" version) for the Fiorenzato F4 M.C. New, F4A V220-110, and F4E models, sized for 58 mm burrs, Fiorenzato part #900000109. The seat that aligns the upper burr against the lower; wear here can undo the benefit of a fresh burr change. Pro Tip: Espresso Parts offers valuable guidance on maintaining your grinder burrs, including when to replace them and how to change your coffee burrs. About the Brand For over 80 years, Fiorenzato has been an Italian leader in coffee grinder design, known for consistency and reliability with responsive touchscreen controls for monitoring stats and dosing. Burrs are produced in-house on CNC machinery, and Fiorenzato grinders have a reputation for staying clean on the bar with minimal mess. SPECIFICATIONS 58 mm burr fitment, "new ring" upper carrier design COMPATIBILITY Fits: Fiorenzato F4 M.C. New, F4A V220-110, F4E Replaces: Fiorenzato #900000109 INSTALLATION Grinder teardown to the upper burr assembly required; moderate difficulty, best for an experienced technician or confident DIYer. PRO TIPS Make sure your model uses the "new ring" carrier design before ordering, Fiorenzato revised this carrier's ring profile, so it's worth confirming against your old part rather than matching by grinder name alone.