Enhance Your Coffee Experience - Same concept as puck screen, better distribution of water flow from shower head, more espresso extraction; What's more, compared to stainless steel puck screens, these paper espresso filters no longer require the metal puck screen to be removed from the coffee grounds for cleaning. Premium Matreial - Each espresso filter paper is made from natural virgin pulp, chlorine-free. Clean & Tidy - No direct contact of espresso powder with the espresso machine shower head, and always keep the shower head clean and tidy. (The [51mm] coffee filter also compatible with the bottom of the [54mm] portafilter.) Customized Design - Designed to compatible with 51mm Portafilter including Delonghi EC-680m, ecp3220, ec685, EC702, decica EC680M, dedica 680, coffee emcp50, ecp3420, 6601S, eco 311 and other 51mm machines. What You Get - 600 Pcs 51mm Espresso Machine Filter, 12-Month worry-free warranty, and 24-hour friendly customer service.