Nickel safe - nickel safe formula based on citric acid, non toxic for safety, removes calcium build up Commercial ice systems - for use on all commercial ice systems as cycle and soak cleaning product for use with all big brand ice makers. Please see below. VISUAL CLEAN CUE - Green dye allows for visual cue when cleaning equipment, for thorough rinsing Five use - each bottle contains five Uses For Use With - For Use On Ice Machine Brands Including: Whirlpool, Manitowoc, Hoshisaki, Ice-O-Matic, Scotsman, Follett, ITV Makers, Wolf, Sub-Zero & More. Afresh / Whirlpool 4396808, Nu-Calgon 428734, 4287-34 & GE WX08X42870, Scotsman 19-0653-01, Manitowoc 5162 & 000000084 URN5401 Urnex Freez Ice Machine Cleaner An ice machine cleaning liquid for use on a variety of commercial ice systems as cycle-and-soak product. Formulated from nickel-safe ingredients. Contains a green dye to ensure proper rinsing and safe use. Instructions: Create solution of 45ml of Freez with 1.9L of water Pump through the water system for 10 minutes or as per machine manufacturer’s recommendation. Purge and rinse machine with potable water. Sanitize according to local guidelines