QUANTITY - This item is sold in a carton of 144 tablets. EFFECTIVE IN CLEANING - The toilet bowl cleaner tablets can automatically clean the entire circulation system of the toilet, and lasting fragrance. After the use of this blue toilet bowl tablet, thick lubrication protection will form on the side wall, preventing the adhesion of stains. ECO-FRIENDLY MATERIAL - The materials are friendly and pollution-free. The component of deodorant takes the hassle out of keeping your toilet smelling fresh and clean. PLEASE NOTE - Do not tear off the blue outer protective film, which is soluble in the toilet tank directly. Please leave the toilet tank cleaner in the toilet tank for at least 10 minutes to dissolve sufficiently until the water gets blue before flushing. Please clean the toilet tank with a toilet brush before the first-time use, so as to make better use of this product. EASY to USE - Just put one blue toilet cleaner bubble directly into the toilet tank then it will make the toilet refresh under every brushing. Toilet cleaner saves your time and protects your health. It will not cause any damage to the internal parts of the toilet tank. Keep your toilet clean and sanitised with ease using these drop-in toilet blocks. The blocks are simply dropped into the water tank of your toilet (cistern) and are activated every time the toilet is flushed. These wonderful toilet blocks prevent stains from occurring in your toilet bowl, stop the build-up of limescale, kill germs and automatically clean your toilet bowl. They feature a disposable wrapper meaning that they can be dropped right into the toilet tank and they last for up to four weeks. THE BASICS QUANTITY - This item is sold in a carton of 144 tablets. EFFECTIVE IN CLEANING - The toilet bowl cleaner tablets can automatically clean the entire circulation system of the toilet, and lasting fragrance. After the use of this blue toilet bowl tablet, thick lubrication protection will form on the side wall, preventing the adhesion of stains. ECO-FRIENDLY MATERIAL - The materials are friendly and pollution-free. The component of deodorant takes the hassle out of keeping your toilet smelling fresh and clean. PLEASE NOTE - Do not tear off the blue outer protective film, which is soluble in the toilet tank directly. Please leave the toilet tank cleaner in the toilet tank for at least 10 minutes to dissolve sufficiently until the water gets blue before flushing. Please clean the toilet tank with a toilet brush before the first-time use, so as to make better use of this product. EASY to USE - Just put one blue toilet cleaner bubble directly into the toilet tank then it will make the toilet refresh under every brushing. Toilet cleaner saves your time and protects your health. It will not cause any damage to the internal parts of the toilet tank.