Falcon Velocity Cartridges uses industry leading technology. The self-monitoring indicator provides you with a visual signal that helps you know when it is ready to be changed, making maintenance easier. The patent-pending anti-splash pour spout utilizes speed and direction to streamline urine through your pipes and help keep your housing and drain cleaner. The patented cartridge helps keep your restroom virtually odor-free by reducing the area where bacteria can grow. The interior baffle allows the cartridge to retain its sealant barrier even under the most challenging maintenance practices. The Velocity cartridge boasts all of these features while using 20% less plastic than previous models. 1 each