The Surge 3D patented urinal screen releases more than twice the active ingredients as look-alike screens, over 30 days to keep the urinal and restroom smelling fresh. The Surge doesn’t' just mask, it releases optimized bacteria that consume odors. The revolutionary design features a post & lattice design extending through the screen and diffuses the urine stream while releasing a pleasant fragrance. The 2-sided anti-splash design removes 99% of urine splash either side up! The Surge 3D easy reminder system lets you know when it's time to replace the screen. Simply remove the tabs upon installation to set your replacement date.