Bowl Fresh Bicolor, blue plus lavender fragrance. Tablets clean and deodorize with the power of Borax and detergents. Each tablet lasts up to 30 days. Prevents stains due to hard water, mineral, and lime scale. Safe for plumbing and septic systems. Completely dissolves in tank. Leaves no unsightly residue. Twin pack, 2 tablets, each 1.7 oz.