SIFTING GEAR If you're already lucky enough to own a Kruve sieve then why not add some extra sieves to experiment with grind size to get your perfect brew. A super sieve system removes both Fines and Boulders, leaving you with just the grind you need to make a great tasting coffee. Customize Grind Size Within a Desired Micron Range to get full control over your grind size. You can customize your coffee recipe down to a precise micron range. Use only the grinds you want! Nothing bigger, and nothing smaller. 1400 μm Sieve