51MM DIAMETER: This 3 ears bottomless portafilter is designed to compatible with Casabrews 5418, 3700, 3700pro, 3700gense, etc. espresso machine models. Please feel free to contact us if you have any questions about the product.

MULTIPLE ACCESSORIES: Comes with a double cup filter basket and a 51mm espresso puck screen. This 54mm puck screen helps prevent coffee grounds from sticking to the espresso machine brewing head, keeping the brewing head clean.

HIGH QUALITY: The portafilter head is cast in food-grade stainless steel and high polished by manual, precise size ensures the portafilter is engaged in the group firmly. The portafilter handle is made of 100% natural solid wood, solid surface and ergonomic design to ensure perfect grip and easy manual control.

EXTRACTION IMPROVEMENT: When using a bottomless espresso portafilter, you can see the extraction process more intuitively, so as to help you correct and improve the extraction problems. A great helper for making coffee.

PLEASE NOTE: Our portafilter are designed to fit snugly into the brewing head, providing a tight seal when brewing. However, due to the varying tolerances between machines, some may fit more snugly than others. The thickness of the ears: 4.4mm.