- Compatibility: 51mm bottomless portafilter designed for Delonghi machines including ECP3420, ECP3120, EC155, BCO430, and EC260. Before purchase, please confirm your model. If you have questions about compatibility, feel free to ask. - Stainless steel craftsmanship: Forged from food-grade stainless steel with a high-polish finish for durability and easy cleaning. The ergonomic rosewood handle provides comfortable use. The 51mm head supports thorough filtration with minimal impurities. - Innovative detachable design: Detachable bottomless filter holder is easy to assemble and disassemble, making cleaning and maintenance quick. This design also supports easy replacement with alternative filter baskets. - Precision espresso mastery: Engineered for precision and user comfort. The rosewood handle enhances control during extraction, helping you achieve consistent results. Suitable for both beginners and seasoned baristas. - Use scenarios: - Troubleshooting extraction: observe the espresso flow to identify channeling and adjust grind size and tamp accordingly. - Experimentation: swap filter baskets to dial in grind, dose, and pressure for your preferred profile. - Routine setup and maintenance: quick cleaning and easy basket changes after sessions.