Rancilio Rocky
Rancilio Stone / MD40 / Obel Bregant 50 mm (suitable for Juniors and Roma models only) espresso grinder accent set. Aftermarket burrs made to the same quality standards as OEM. Ø 50x31x8mm left hand rotation For Rocky users: the burr mounting screws reportedly get REMARKABLY tight and might strip when you try to eliminate them.