Urnex Cafiza Commercial Espresso Machine Cleaning (backflushing) Tablets E31 Cafiza Espresso Machine Cleaner Powder is an integral part of the daily maintenance routine for espresso machines. Specifically formulated for effective use in the back flush cleaning process, Cafiza is designed to combine maximum solubility and cleaning power with easy rinsability. Cafiza is recommended for use with a wide range of traditional espresso machines and is NSF certified for metal compatibility and safety. Concentrated formula eliminates residue in group heads, valves and lines machines. Integral to the daily back flush regimen. Foam and solubility balanced for optimal rinsing. NSF certified for metal compatibility and safety and OMRI™ Listed for use in Organic Production.