【54mm Flat Burrs】Custom made 54mm stainless steel flat burrs. 【Plasma Generator AKA Ionizer】Plasma Generator inside exit chute reduces static. 【Single Dose & Zero Retention】True Zero Retention <0.1 gram. Even without bellow this grinder reaches almost zero retention. Use blow-out funnel with lid to completely empty the dead space. 【Anti-Popcorn Disc Integrated】The integrated Anti-popcorn disc prevents jumping beans and increases grinding speed. 【Stepless Adjustment】Redesigned dial is wrapped with chrome. The included metal indicator makes grind size so much easy to adjust. The adjustment is stepless. It can be dialed in for espresso with high precision. 【58mm Transparent Plastic Dosing Cup】It comes with 58mm food grade transparent plastic dosing cup. While a portafilter can be used in the portafilter rest, it is best to use the dosing cup, especially if your portafilter isn’t 58mm. MiiCoffee DF54 single dose coffee grinder is entry level flat burr coffee grinder. It integrated the best elements from DF64 II but is made into a smaller package. The three seated position for the upper burr carrier integrated wave spring makes the grinding chamber absolutely stable. At the same time it achieves minimal retention at the new level. The exit chute is equipped with plasma generator (aka Ionizer) that reduces static to non-existent. DF54 comes with custom made stainless steel 54mm flat burrs that deliver a fluffy grind with minimal clumping and consistent particle size distribution. The integrated Anti-popcorn cover help increase grinding speed.