30-day urinal screen. It contains 3-5 times more fragrance than competitors. The patented two-sided design eliminates 98% 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 date tabs for replacement reminders and contain beneficial bacteria that consume odors and keep drains clean, clear, and smelling fresh.