BLEACHING IS WHAT WE DO: Containing powerful bleaching ingredients, Vacplus toilet bowl cleaner tablets can efficiently remove stubborn stains such as urine dirt, limescale, and rust stains with every single flush. If you feel the smell of bleach every time, don't worry, it is the powerful cleaning ingredients functioning. Keeping your toilet bowl freshened is what Vacplus is doing! SUSTAINED-RELEASE TECHNOLOGY: With the sustained-release technology, each Vacplus toilet cleaner with bleach can continuously freshen the toilet bowl for at least 15 days, during which it generates a protective film, effectively preventing stubborn stains from adhering. EASY OPERATION: BRUSH THE TOILET BOWL FIRST BEFORE EACH USE! Simply unpack the packet, and then drop the bleach toilet bowl cleaner into the water tank and leave it doing the cleaning. Preparation is complete, all you need to do is to flush when necessary. The effortless operation saves you much time and energy. USER-FRIENDLY INGREDIENTS: Vacplus toilet tank cleaner tablets are all made of neutral dye-free ingredients and carefully packed in a packet, ensuring hassle-free use without direct contact with skin and causing no damage to any metal or plastic part in the septic tank system. LONG-LASTING USE: Each Vacplus toilet tablet lasts for at least 15 days, saving you a lot of time and energy from frequent replacement. What is more, the 12 tablets in total for replacement can continuously freshen your toilet bowl for more than 25 weeks!