Efficient cleaning: Put the automatic toilet bowl cleaner into the water tank, clean the scale of the tank, clean the toilet urinary scale, and reduce adhesion and precipitation. No external store connection .1 time installing and no cares about it . Good internal components: Toilet tank cleaner will not affect the water tank, drain pipe and bottom wax seal. Long-lasting protection: A bottle of automatic toilet bowl cleaner system can be washed 900 times, continuous use, thereby reducing the number of hand brush. Fragrance cleaner cleans deeply and keeps your toilet clean with fresh scent. Cleaner block will slowly dissolve and infiltrate through the holes, you can use once for a long time instead of changing frequently. Unique design and simple operation: Automatic toilet bowl cleaner adopting a colloidal. Open the package, take out the upper stopper and put it in tank.