Zep Acidic Toilet Bowl Cleaner quickly eliminates rust, organic stains and hard water residue from toilets and urinals. Its powerful 10% acid gel formula tackles even the most stubborn of stains, while the thick gel clings to vertical surfaces. The angled neck and squirt top make under-the-rim application easy. Plus, its fresh winter green scent neutralizers harsh odors. Zep Acidic 32-fl oz Toilet Bowl Cleaner | ZUATBC32