16 OZ, Concentrate, Bacterial Drain & Trap Cleaner Special Bacterial Enzyme Formula Works Fast To Open Slow or Sluggish Drains Monthly Treatment In Sinks Tubs & Showers Helps To Prevent Clogging In Traps & Drains Safe For Use With Septic Tanks & Cesspools NonCaustic Safe For Toilets Can Be Used To Clean Garbage Disposals Certified Biodegradable By Scientific Certification Systems, Biodegradability Achieved In 10 Days.