Optimal coffee and tea enjoyment: Descaler for filter machines and kettles for easy removal of limescale deposits Particularly thorough and gentle: quick dissolving of fine powder in water, Gentle and thorough cooperation with the concentrated power of citric acid Recommendation: Regular decalcification for maintenance of the value and proper functioning of fully automatic coffee machines 6 Applications, 20g each. Causes serious eye irritation. Causes skin irritation. May be corrosive to metals.