Harpic blue power 6 toilet rim block in atlantic burst fragrance will keep your toilet fresh and clean for up to 4 weeks generating a cleaning foam it helps to get rid of limescale remove dirt and keep your toilet shining every flush of your toilet releases more of the atlantic burst fragrance whilst colouring your water blue so you can easily see when it needs replacingwarningmay cause skin irritation harmful to aquatic life with long lasting effects keep out of reach of children