The Coffee Catcha 58mm fits most regular coffee machine portafilters including: La Marzocco, Synesso, Slayer, Nuova Simonelli, Victoria Arduino, Rocket, Vibemme, Wega, San Remo, Breville (professional models), Astoria, Faema, La Cimbali, Orchestrale, Rancilio etc. (fits 56-59mm).