Single Pack of Black Swan Mfg Black Swan Drain Opener & Cleaner. A special blend of potassium and sodium hydroxide designed for cleaning clogged drain pipes due to grease, hair, lint, paper, food scraps, and all organic material. Will not harm plumbing fixtures, porcelain or septic systems. Fast acting and odorless. No. 09300: Container Size: 32 Oz., Product Form: Liquid, Residential/Commercial: Residential, For Septic Use: Yes, Set Time: 30 Min., Prevention Formula: Yes, Number Of Treatments Per Container: 4, Compatible Pipe Material: Multi-Purpose, For Use With: Bathtub/Sinks/Toilet, Pkg Qty: 1, Package Type: Bottle No. 09310: Container Size: 64 Oz., Product Form: Liquid, Residential/Commercial: Residential, For Septic Use: Yes, Set Time: 30 Min., Prevention Formula: Yes, Number Of Treatments Per Container: 8, Compatible Pipe Material: Multi-Purpose, For Use With: Bathtub/Sinks/Toilet, Pkg Qty: 1, Package Type: Bottle ⚠ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.