Q2 MANUAL COFFEE GRINDER – HEPTAGONAL VERSION. 1Zpresso Q2 Manual Coffee Grinder 1pcs, Cleaning brush 1pcs, Portable canvas bag 1pcs. Dimensions: 14.5 x16 x 4.6 cm. Materials: 420 Stainless steel, 304 stainless steel, aluminum alloy, and wood. Pentagonal Burr // Discontinued. Better grinding efficiency compared to the Heptagonal version. Heptagonal Burr More effortless compared to the Pentagonal version.