This bottomless portafilter basket setup from Sanremo is designed for espresso extraction without the filter basket walls, allowing you to see the puck formation and flow dynamics during brewing. The triple-shot basket holds approximately 21 grams of ground coffee with 6.4mm wing spacing. Compatible with: Sanremo Amalfi, Capri, Easy, Milano, Roma, Torino, Verona, Zoe, and similar group head models. The naked portafilter design is useful for diagnosing extraction issues and performing espresso technique analysis. Proper puck preparation and tamping technique are essential when using a bottomless basket, as any inconsistencies will be immediately visible during extraction.