Wave 3D is a 30-day urinal screen that contains three to five times more fragrance than other urinal screens. Patented, two-sided design eliminates 97 percent of urine splash on both sides for error-free installation. Crafted for convenience, simply place the Wave 3D over the drain in the urinal, and you're done. Each screen has a date tab for replacement reminders. It contains beneficial bacteria that consume odors and keep drains clean, clear and smelling fresh with a Cotton Blossom fragrance.