This Blind Portafilter Basket can be used in backflushing most machines that use a 58mm tamper. These include: Wega, Faema, Rocket, Vibiemme, Isomac E61 type, Gaggia, Rancilio, Nitro, Brasilia, Conti, Astoria, Nuova Simonelli, Marzocco, San Marino, San Remo etc.