All natural toilet cleaning bombs - set of 15 - refill pack. Made from all natural ingredients, drop one in your toilet as needed after a gentle swoosh with your toilet brush to keep your toilet clean and smelling fresh. Baking soda and essential oils help to eliminate odors while castile soap and citric acid help to break down stains. Bombs are slow dissolving and may take several minutes to dissolve completely. Drop one ball in overnight and allow it to dissolve and clean while you sleep! Labeling may vary depending on scent. •minimal waste •natural ingredients •set of 15 •about the size of a golf ball •lemon lavender, peppermint or citrus scent •also available unscented for those sensitive to smells.