Kaboom Continuous Toilet Cleaning System, Refillable 1 Ea

Snaps in tank! Cleans completely, even under the rim! Cleans up to 3 months. Constant Cleaning Action Prevents: Rust & hard water, grime. Includes one cartridge. Won't harm tank parts. Safe for septic systems. Make your worst cleaning job history - NeverScrub your toilet again. This revolutionary system injects Kaboom's powerful cleaning formula into your bowl after every flush, preventing stains from attaching and keeping your toilet clean for up to three months. Nothing works like NeverScrub! Made in USA.