The "Gold-Standard" of professional Espresso grinding for medium-volume Cafés (less than 30 kgs per week) made in Germany by Mahlkönig. Industry-leading grind speed of up to 4.5g/sec for recipes of 18gs and 40ml extraction in 30 seconds. Fast beverage preparation and best taste for up to 800kg of grinding volume. Material: hardened special steel Diameter: 65mm Finish: glass bead blasted for optimal deburring and prevention of burr settling behavior Hardness: 64-66 HRC (Rockwell) Medium Setting Grind Life: ca. 800kg Blades are specifically tailored for the Mahlkönig K30 OR Mahlkönig E65S OR E65S GBW