- Compatibility: This 54mm three-ear bottomless portafilter is designed specifically for Barista Pro (BES878), Barista Express Impress (BES876), Bambino Plus (BES500), Infuser (BES840), Barista Touch (BES880), Barista Express (BES870), Duo-Temp Pro (BES810), and Bambino (BES450). Ensure to verify your machine model before ordering to avoid compatibility issues. - Enhanced Extraction Observation: The bottomless design allows you to monitor the entire extraction process in real-time. This visibility helps identify and address problems with grind size, distribution, or tamping, making it an essential tool for improving your espresso quality. - Puck Screen for Consistent Results: The included puck screen ensures even water distribution across the coffee grounds. This feature minimizes channeling, leading to a more uniform extraction while keeping your machine's brewing head clean. - Durable Construction: Made from high-quality food-grade stainless steel, this portafilter is built to last. It guarantees that your espresso remains pure and free from contaminants, ensuring the integrity of your beverage. - 304 Stainless Steel Double-Shot Filter Basket: The durable double-shot filter basket made from 304 food-grade stainless steel allows for optimal espresso extraction, preserving the rich flavors of your coffee. - Practical Applications: Ideal for home baristas looking to refine their espresso-making skills, this portafilter is perfect for experimenting with different grind sizes and tamping techniques. Whether you are preparing a morning espresso or hosting a coffee-tasting session, this tool enhances your brewing experience. - Improved Extraction Quality: The unique design not only aids in observing extraction but also contributes to the overall quality and consistency of your espresso shots. Enjoy café-quality results from the comfort of your home.