About This 51mm Exact Fit for Delonghi Dedica Series: Dedicated to 51mm Delonghi models: ECP3420/ECP3120/EC155/BCO430/EC260 espresso machines. Please note it is not compatible with other models—ensure your machine matches for perfect fit. Enhanced Extraction Observation & Control: Bottomless design lets you monitor shot flow, rate, color and stripes in real time, helping identify extraction defects early and judge uniformity. For optimal results, use fresh grounds, fine-tune grinder settings, apply WDT technique and tamp evenly—effectively reducing channeling and spurting. Premium Durable Construction: Made of food-grade 304 stainless steel for long-lasting use and excellent heat retention. Manually polished surface boasts a sleek professional look and corrosion resistance. Ergonomic plastic handle offers a comfortable, secure grip for easy manual operation. Included 2-Cup Stainless Steel Filter Basket: Comes with a 51mm stainless steel filter basket (2-cup capacity, holds up to 16g grounds). Confirm your original portafilter’s 51mm size and 2-ears design before purchase to avoid mismatch. Effortless Maintenance: Easy to clean and maintain—simply rinse with warm water after each use and wipe dry. Smooth finish prevents coffee residue buildup, ensuring consistent performance and a pristine condition over time.