Ultra clean toilet tablets. 4-pack cleans for 16 months. Continuously cleans, prevents stains & deodorizes. Cleans & deodorizes with every flush. www.clorox.com. how2recycle.info. Questions or comments? Please visit www.clorox.com or call (800) 227-1860. For more product ingredient information, visit www.smartlabel.org. Also Try: Clorox toilet bowl cleaner clinging bleach gel. Environmental Commitment: Box made from 100% recycled paperboard (minimum 35% post-consumer). Product contains no phosphorus. Made in USA.