Kernwerk Feinsieb Precision Mesh Filter

The Feinsieb applies grinder-shop thinking to a filter: a chemically etched stainless cone whose pore size is held to a tight tolerance across the entire surface, rather than varying the way woven mesh does. Uniform pores mean uniform flow — the bed drains evenly instead of channeling through loose spots, which is the same principle that makes an even grind extract evenly. The cup lands between paper and typical metal: noticeably more body and aroma-carrying oils than paper, with less sediment than a woven filter passes. Pair it with a grind just coarser than your paper setting. The etched surface releases spent grounds with a tap and rinses clean fast; a weekly soft-brush wash keeps the pores open. Built, like every Kernwerk product, to outlast its owner's other gear.