18g ridgeless (smooth wall) version of portafilter basket. Dose: 17 - 19 gHeight: 24.2 mmOuter diameter: 60 mmTamper: 58.3 - 58.4 mm
Official filters used during the prestigious World Barista Championship in 2012, 2013, 2014 and 2015. They allow for uniform extraction due to their precise hole arrangement keeping + /- 1 mm distance. All the holes are inspected for shape, proper distribution and errors.
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