Experience uniform extractions across all groups for the first time – permanently. The essential espresso filter for those in search of the ultimate cup. Suits most E-61 group heads and any group that measures 60mm in diameter and work with a tamper 58.3mm. Recommended for use with the following machines: La Marzocco, Synesso, Nuova Simonelli, Faema, La Cimbali and Rancilio with standard portafilters. Also compatible with the La Marzocco SWIFT Grinder.