VST’s new filters deliver consistent extraction performance over a wide range of concentration with reduced sediment. Each filter is designed to brew properly as a Normale, Ristretto or Lungo within a narrow gram capacity range. We definitely recommend using these baskets to see the greatest result you can expect. 3 different models of VST Precision Filter Baskets; 15g, 18g and 22g perfectly fit all La Marzocco Machines which we use, Synesso and most of Nuova Simonelli. Please check out VST Website to see the other suitable espresso machines.