The Kruve Sifter is a professional coffee strainer that can be used to improve the taste of your coffee .The MAX set consists of a silver Kruve sifter, 15 GRIND Sevens. 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600 μm, 10 BEAN Sieves: 11, 12, 13, 14, 15, 16, 17, 18, 19, 20/64" and portafilters. Perfect for roasting and brewing coffee. The set also includes the Kruve Brewler. Grinding your coffee is not only about the right grind size for your brewing method, but also about the most uniform coffee particles possible. Control the extraction and bring out the clean taste. With Kruve you can separate fines (particles that are too small) and debris (particles that are too large) for the perfect grind.