CLR Pro Calcium Lime and Rust Remover - For Multi Surface, Multipurpose - Liquid - 640 fl oz (20 quart) - 2.05 to 2.3 pH - Acidic Scent - Recommended For: Calcium Deposit Remover, Rust Remover, Limescale Remover, Soap Scum Remover, Dirt Remover, Hard Water Deposit Remover, Mineral Deposit Remover - Phosphate-free, Ammonia-free, Bleach-free, Kosher, Non-flammable, Heavy Duty - Crystal Clear, Lime Green - 1 Each