MaterialStainless Steel ShapeBasket Number of Pieces500 1.EASY TO CLEAN: The espresso paper filter will prevent fines getting into the coffee from that crappy grinder and no need to thoroughly clean metal filter and the gasket. Extend the life of your espresso machine that too makes for less cleaning. 2. SAFE AND CHLORINE-FREE: These espresso machine filter paper are selected from natural virgin pulp, with nice air permeability, strength and water permeability, also with clear embossing and firmness while having the least possible environmental impact. 3. CONVENIENT TO USE: Compared to stainless steel puck screens, which themselves get dirty and must be periodically soaked. The disposable coffee filter paper unbleached mean that you can enjoy delicious coffee without needing to clean out a metal filter.