Check the listing for details. Fluidmaster Flush‘n Sparkle Refill Cartridges (2/pk) - NEW. Condition: New. Listed at 16.95 USD. YOUR CHOICE FROM ONE OF THREE SYSTEMSFluidmasterFlush’n Sparkle Cleaning System - Refill Kit (2 Cartridges/pk) 8102 – Blue (Blue) 8202 – BioBalance™ Septic (Green) 8302 – Bleach (White) Automatically cleans your toilet with every flush. This environmentally friendly product provides cleaning solution directly into the bowl without harming the toilet tank components. These are the replacement cleaning cartridges for Flush n’ Sparkle™ Cleaning System. · Isolates cleaner from the tank water so tank parts aren't damaged by the detergents or bleach used by other in-tank cleaners · Cleanser-treated water is injected only to the bowl, where it is needed, so cleaner application is efficient · Cleaning agent reduces spread of viruses and bacteria · Each cartridge lasts up to 3 months (2 cartridges per refill package) See the other items I have on offer at my eBay store. http://stores.ebay.com/sunroofguy All items are carefully packaged with your security & privacy in mind, just as I would expect them from any reputable seller on eBay. 1531-1532-1533