http://www.furniturerig.com/item/14575/scotch-brite-toilet-bowl-scrubber-refill/ 3M Commercial Office Supply Div. Restroom Supplies MMM557BLR Refill is designed for use with 3M Toilet Bowl Scrubber Kit. Includes six disposable scrubber heads that contain a blue cleaning chemical. Water turns blue, indicating the cleaning chemical and bleach have been activated.Packaged Quantity 6 PackProduct Type Scrubber RefillApplicationUsage Bowl DisposableColor BluePackage Contents Toilet Bowl Scrubber Refill Six x Disposable Scrubber HeadsRecycled NoRecycled Content 0%Postconsumerwaste% 0%Assembly Required No