1.Update Configuration FilesThe cleaning disks are exactly the same as the latest original accessories of the Breville coffee machine. There is no water outlet in the center of the latest accessories, don't worry, there is a backflow device inside your machine. 2.Widely CompatibleThe backflushing disc is suitable for Sage or Breville 8 series coffee machines, please check the size of your coffee machine in the last picture of the window. Suitable for Breville/Sage Bes870XL Bes860XL Bes840XL Bes450 Bes500 Bes878, bes880, gruppo izzo, spaziale, san marco, wega. 3.Clean Your Espresso MachineKeeping your espresso machine clean is essential for getting the shot of espresso every time. This backflush disk is an effective solution to help you maintain coffee flow. 4.Easy To UseFollow the instructions on the steps in our picture or just search for 'clean coffee machine' on YouTube to find instructions. You can easily know how to use it. Place it in the portafilter and run the cycle a few times.