Fangrui Product Details [the Advantages Of A Bottomless Portafilter] The Bottomless Design Allows You To Clearly Observe The Entire Extraction Process, Helping To Spot And Correct Issues With Grind, Distribution, Or Tamping. Its A Must-have For Those Looking To Improve Their Espresso Quality. [included Puck Screen For Even Extraction] The Puck Screen Promotes Even Water Distribution Across The Coffee Grounds, Reducing Channeling And Ensuring Consistent Extraction. It Also Helps Maintain The Cleanliness Of Your Machines Brewing Head. From Food-grade Stainless Steel: Constructed With High-quality Food-grade Stainless Steel, This Portafilter Guarantees Safety And Durability, Ensuring That Your Espresso Remains Pure And Taste-free From Contaminants. [stainless Steel Double-shot Filter Basket] Made From 304 Food-grade Stainless Steel, The Included Double-shot Filter Basket Ensures A Pure, Untainted Espresso Extraction While Preserving The Rich Flavor Of Your Coffee. Design For Improved Extraction Quality: The Bottomless Design Of Th