Kaboom 2-Pack Toilet System Refills keep your toilet bowl sparkling clean without the hassle of scrubbing. These refills feature a powerful bleach-based formula that effectively cleans and disinfects your toilet with every flush, lasting up to 6 months. Forget about everyday maintenance, handling harsh chemicals, or using a smelly brush. Kaboom Scrub Free is a revolutionary toilet cleaning system that eliminates the worry and hard work from toilet cleaning for up to three months. Installation is a breeze and takes less than 2 minutes. Over 80% of consumers who have tried Kaboom Scrub Free would recommend it to a friend.