Nanquartz coated Precision Filter basket with largest filtration area of 715 holes enables extraction of much finer grind. The Basket will fit from 16 to 19 grams, depending on coffee roast and grind. Basket will fit from 16 to 19 grams, depending on coffee roast and grind. Developed by special IMS Filtri project E&B Lab to highlight taste in light to medium roasts For 58mm Portafilters and 58.5mm Tampers Fits most E61 group head portafilters. Compatible with Gaggia, E61 Group, Astoria, Casadio, Conti, Elektra, Fracino, Keesvanderwesten, Magister, Marzocco, N.simonelli, Pavoni, Promac, Rancilio, Slayer, Synesso, Victoria Arduino, Ascaso, Bezzera, Bfc, Bianchi, Brasilia, Ecm, Expobar, Faema, Fiorenzato, Grimac, Iberital, La Nuovaera, La Scala, L'orchestrale, Qualityespresso, Rocket, Sab Italia, Sanremo, Vfa, Vibiemme, Wega, Slayer, and Synesso. Precision Basket with Nanoquartz coating developed by special IMS Filtri project E&B Lab. Nanoquartz coating makes surface smoother, increases flow, coffee and oils does not stick to the surface and basket remains much cleaner. Double espresso basket is ridgeless, with flat bottom. Dimensions: edge to edge ø 70 mm. BODY: Ø 60 mm for Ø 58.5 mm tamper PERFORATED AREA: Ø 49 mm HOLE DIAMETER: 0.30 mm Holes: 715 Material: Stainless steel AISI304 Food Safe. Electropolished surface. Made in Italy Fits most E61 58mm group head machines, including: Astoria CMA, Bezzera, Brasilia, Casadio, Conti, ECM, Elektra (commercial), Expobar, Faema, Fiorenzato CS, Futurmat, Gaggia (commercial), Grimac, La Marzocco, Nuova Simonelli, La Pavoni (commercial), Rancilio, Rocket, Slayer, Synesso, Vibiemme, Victoria Arduino, Wega, and more.