12 Oz, Glisten Washer Magic, 2X concentrated formula with 3 uses per bottle, specifically designed to remove the scale and hard water build up from washer tubs that damages clothes, reducing their useful life, when circulated in the machine during the wash cycle, increases the solubility of lime scale build up, use it every month to help clean lime rust and build up, odor causing residue and maintain washer performance, clean washers are gentler on clothes which extends clothing life, use more frequently for strong odors or in hard water areas, works on both top load and front load washing machines. WASHER MAGIC 12-fl oz Washing Machine Cleaner Liquid | WM0612N