Developed in collaboration with IMS, this precision single filter basket is engineered specifically for DeLonghi espresso machines with 51 mm group head portafilters for single espresso doses of 8-13 g. The basket features a narrow base that directs water flow toward the center of the puck. This geometry enhances extraction, improves crema formation, and supports efficient puck drying and clean ejection. Perfect for use with BOTTOMLESS portafilters. Fits original DeLonghi portafilters with plastic inserts. The carefully calibrated hole pattern accommodates all roast styles, from light to dark, highlighting fruity notes, increasing body and crema in the cup. Reliable Choice for DECAF Coffee. Decaf coffee extracts faster and can be harder to control. The narrow base and precision hole pattern help manage flow, reduce channeling, and improve body, sweetness, crema. Made in Italy from high-quality stainless steel, IMS Precision Filter Basket is an essential tool for home baristas who want consistantly achieve amazing results