Versatile urinal freshening: Perfect for domed waterless urinals, urinals with domed metal debris traps, or urinals with standing water. Unique design provides a burst of fragrance collected in the headspace with every use. Keeps your restroom cleaner: Unique dome shape helps reduce urine splash and over-spray on your floors, walls, and partitions. Protects your drains: The unique raised dome shape helps the screen stay in place and protect your drains over the course of 60 days. No more floating or movement in your urinal.