Harpic Flushmatic is a drop-in tank tablet which can be used for any accessible cistern. It works from inside the cistern to release a dose of powerful detergent with every flush. Distributing the liquid across the bowl, it helps you maintain a hygienic and deodorized toilet and prevents the build-up of stains giving you a continuous clean toilet. Harpic Flushmatic citrus provides continuous cleaning, easy to use with no mess, cleans with Green action, lasts upto 1 month depending on usage. India's # 1 Toilet Cleaner*. Available in 2 fresh fragrances: Marine and Citrus.*Harpic claim as per Nielsen Retail Index data for period MAT Oct ‘20 for the India market in Cleaners – Toilet & Bathroom Category.