"Grande DUO" distributor for barista; for perfect extraction with portafilter machines; 58 mm; different colors; heavy version of scarlet espresso

 If you hold your portafilter directly under the grinder, you usually have a tapered pile of ground coffee in the sieve after the grinding process. If you then make the mistake of tamping the coffee grounds directly, you get a #coffeepuck that is much thicker in the middle.  Find siebträger distributor.