Kafvalubre Bottomless portafilter allows you to see the espresso as it exits the basket. This allows you to immediately identify any faults in your dosing or tamping technique. You may be tamping slightly unevenly without ising it; with a 51mm bottomless portafilter you will see espresso leaving one side of the basket before the other side instead of it appearing evenly, something which would be impossible to gauge with a spouted portafilter. As the shot pulls, you can see the droplets of espresso forming on the bottom of the basket. You can then see the stream flowing down into your cup. It’s ! This 51mm naked portafilter Compatible with DeLonghi series: ECP702 ECP3630 ECP155 ECP265 ECP260BK ECP3120 ECP3220 ECP3220R/ECP3220W ECP3420 EC702 EC330S/EC330 EC260 EC235 EC221 EC200 EC156B EC155M EC152 EC0311 BCO432 BCO430 BCO420 ECO310 Coffee Machine. Product Feature Material: 18/8 Stainless Steel(#304) + Plastic Handle Weight: 306g Size: 51mm Bottomless Portafilter Package Includes ---Bottomless portafilter 51mm ---Non pressurized basket