Contains blue purifying particles for a potent bubbling effect Specially designed for eliminating stubborn stains & black dirt accumulated around the bottom of toilet bowl Helps remove impurities & germs in the drain pipe to prevent odor Offers simple & convenient application The sterilization rate is 99.9% Types of germs being tested: colon bacillus, staphylococcus, pseudomonas aeruginosa Releases a refreshing mint scent Does not cause damage to toilet bowl & pipe