SC Johnson Professional, 32 OZ, Calcium, Lime & Rust Remover, Acid Based, Non-Abrasive Cleaner & Descaler Used To Eliminate & Remove Build Up Of Calcium, Lime & Rust Deposits, Acid Content, HCC With A Buffering Agent, Urea-Hydrocyloride Formula, Works Great On Vertical Surfaces, Ideal For Use In Dish Machines, Toilets, Urinals, Basins & Wherever Else Water Discolorations & Deposits Are Found.