Sani-360 Concentrated Cleaning & Sanitation Sticks keep your drain pipes clear and odor-free. Drop one stick down your drain per month. Safe For Septic Tanks, Kitchen, Vanity, Bathtubs, Utility, sinks Concentrated cleaning and sanitation sticks you drop in the drain once a month to prevent backups, clogs and nasty odors. The stick rests in the pipe-trap and slowly releases a blend to enzymes to break down food, grease, and other organic materials. Keeps water flowing and pipes odor-free. 24 Sticks protect multiple drains in your home. Safe for use on all drains. Contents: Non-pathogenic bacteria, lipase, amylase, protease, food substitutes.