Duck Marine 5 In 1 Fresh Discs Refills, just one shot will deliver five different cleaning actions to your toilet. This discreet in-cistern adhesive sits just under the toilet rim, eliminating the need for an unhygienic rimblock. Each flush will release a burst of freshness that cleans your toilet bowl, washes away limescale that harbours germs and continuously fragrances with a refreshing marine fragrance. Pack contains 2 dispensers and 12 marine gel discs.