P-Wave Ultra Big Blue Toilet Bowl Cleaner (Pack of 1) WSUBB P-Wave Ultra Big Blue Toilet Bowl Cleaner (1 Pack) WSUBBThis toilet bowl cleaner lasts for 900 flushes and has increased surfactant concentration to clean and reduce water consumption. Simply drop it in to any toilet cistern, displacing water that would normally be present in the toilet cistern. Ultra Big Blue releases billions of beneficial bacteria, preventing odours and keeping the bowl clean, blue and fresh. P-Wave Ultra Big Blue Toilet Bowl Cleaner 900 Flush Cartridge Note: Image is for illustrative purposes only and may differ from the actual product.