Fiorenzato F4 64 mm Upper Burr Carrier Upper burr carrier sized for Fiorenzato's 64 mm flat burr (FI_214), for the F4 family of grinders. Fiorenzato has spent over 80 years building Italian-made grinders known for consistency, reliability, and being notably clean on the bar, with in-house produced burrs machined on CNC equipment for tight tolerances. SPECIFICATIONS 64 mm outside diameter, sized for the FI_214 flat burr COMPATIBILITY Fits: Fiorenzato M.C. F4A, F4A V220-110, F4E Works with: hopper fixing screw (M4 x 12 mm); hopper guide screw is M4 x 14 flat head with a D8 x 10 mm F M4 thread cylindrical nut (not included) INSTALLATION Moderate DIY job for anyone comfortable disassembling the burr chamber and hopper mount. PRO TIPS Espresso Parts has a detailed guide on grinder burr maintenance, including when to replace burrs and how to change them correctly.