The Discover Cistern Block Is Designed For Use In The Cisterns Of Various Types Of Toilets. Blue Water Will Flow Into The Toilet Every Time You Flush It. Thanks To Its Pleasant And Permanent Perfume Composition, The Smell Of Freshness Will Remain In The Bathroom For A Long Time. Strong Foams. Thanks To The Active Ingredients Contained In The Formula, It Provides Deep Cleaning And Hygiene. It Prevents The Formation Of Lime In Continuous Use. It Has Long Durability.