Boardwalk Gem Urinal Deodorizer Screens freshen the urinal with 10 times more fragrance that's gradually released over 30 days. Composed of natural oils to ensure quality fragrances that are more appealing than traditional scented screens, yet mask unpleasant odor. Constructed from a pliable material that's designed to trap more debris and can be molded to better protect drain. VOC Compliant; safe for waterless urinals.