PRODUCT DESCRIPTION Refill and re-start your automatic toilet bowl cleaning system with Fluidmaster 8302P8 Flush 'n Sparkle Automatic Toilet Bowl Bleach Cleaning System Replacement Cartridge Refills. These cartridges easily replace used bleach cartridges in only a minute. Take the hassle out of keeping your toilet clean with a self-cleaning toilet bowl system that eliminates outdated and damaging tablets and liquid cleaners that can harm toilet components. These bleach replacement cartridges each last up to 3 months for a 6-month total of scrub-free, hands-free toilet cleaning. Relax and let the toilet clean itself with the Fluidmaster Flush n Sparkle self-cleaning toilet system. FROM THE MANUFACTURER Fluidmaster is the #1 toilet repair brand in the world. Since 1957, we have been guiding our customers to the right toilet repair solutions. Fluidmaster is dedicated to making the installation of its products easy and simple with a complete line of toilet repair parts including: fill valves, single and dual flush valves, flappers, tank levers, toilet seals (bowl wax and wax-free), toilet repair kits, flush valve seals, connectors and more. Fluidmaster parts are found in more toilets than all other brands combined. Fluidmaster distributes to over 90 countries and is the trusted brand by toilet manufacturers and professionals worldwide.