Ty-D-Bol foaming Toilet Ring Remover works on a wide variety of common stain causes: rust, calcium, and limescale. Easy to use, simply pour powder into toilet bowl and the foaming action does the rest. Single dose - once a month pre-measured application. No. 411000.6T: Size: 4.5 Oz., Type: Powder, Fragrance: Unscented, Pkg Qty: 1, Package Type: Card