Bottomless 58mm Portafilter with 22g Basket for La Marzocco ✔️ 58mm bottomless portafilter, 22g basket, single unit for La Marzocco This bottomless portafilter is designed for 58mm espresso machines and lets you observe the extraction directly for La Marzocco GS3, Linea Classic, FB70, FB80, and GB5 models. It's a must-have tool in cafes and training labs to dial in grind, dose, and tamping for barista-level shots. ✅ 58mm standard size for precise compatibility ✅ Includes 22g commercial-grade filter basket ✅ Bottomless design for direct flow and visual extraction ✅ Stainless steel body with black handle for durability ✅ Compatible with GS3, Linea Classic, FB70, FB80, GB5 models 💡 What is a bottomless 58mm portafilter used for in espresso extraction? It's a handy tool for visually checking shot quality and dialing in grind, dose, and tamping. - Visual feedback for grind size, dose, and tamping - Quick spotting of channeling and uneven tamping - Improves crema, flavor clarity, and temperature stability - Great training aid for new baristas to develop consistent technique