The Kalita Wave series is a highly desiribale design for coffee brewing. With its unique flat bottom shape and three hole design work in tandem to provide a even extraction of the ground coffee bed. Getting you close to the perfect cup as possible. The Wave can be placed on oyur favourite mug or server to brew into. The 155 model can make up to 500g of brewed coffee. The Kalita Wave 155 white filter papers fit perfectly for the Origin Trinity dripper, notNeutral Gina glass dripper and Kalita 155 drippers. These flat bottomed filter papers will have you making delicious coffee in no time.