Quickly eliminates urinal odors. Lasts up to 30 days. Air activated to begin freshening the air and eliminating offensive odors right away. Made from 100% para-Dichlorobenzene with a saturated deodorant fragrance.Paradichlorobenzene banned for sale in the states of CA, CT, DE, DC, ME, MD, MA, MI, NJ, NY, PA, RI, and the District of Columbia.