Brand: GeeAnkok Features: Perfect Addition to Espresso Brewing-Improve water distribution and eliminate channeling. Keeps Brew Head Clean-Protects the brew head from grounds being sucked up when Lever is lifted. Easy Rinse to Clean-Easily flushed out under the tap to remove any grounds from within. Easy to Use- Just tamper and place it over the Portafilter filter basket, which helps you make delicious and mellow coffee drinks. Note: Given the thermal mass of the screen, it is recommended that it is placed in the portafilter and locked in just before turning on the preheat controller. Details: The GeeAnkok Puck Screen is a new and exciting tool that we've been using recently. This will help to prevent channeling and ensure a more even and balanced extraction with your machine. Specification: Diameter: 51mm Thickness:1.7mm thick with 150 microns filtration holes Material: 316 Stainless Steel The Features: Perfect Addition to Espresso Brewing – Improve water distribution and eliminate channeling. Keeps Brew Head Clean – Protects the brew head from grounds being sucked up when Lever is lifted. Easy Rinse to Clean – Easily flushed out under the tap to remove any grounds from within. Please Note: Given the thermal mass of the screen, it is recommended that it is placed in the portafilter and locked in just before turning on the preheat controller. Guarantee: Friendly Customer Service.Any Questions,Please Feel Free to Contact us.We Will Respond to You Within 24 Hours and Give You a Good Solution. Package Include: 3 pc 51mm GeeAnkok Puck Screen Package Dimensions: 2.6 x 1.9 x 0.3 inches