Ecozone have bundled together 3 packs of their Enzymatic Drain Cleaning Sticks. Using powerful natural bacteria and enzymes they help to break down soap scum and other organic matter that gets stuck in the plughole and pipes causing blockages and bad smells. Actively working to prevent obstructions from occurring, these sticks can help to protect your drains all year round, and with 36 sticks in this pack, you\'ll have your drains protected for up to 3 years. Safe for septic tanks and aquatic life. Breaks down grease, fat and food that accumulates daily in your drains Keeps your drains free flowing, fresh and odour-free Each packet of drain sticks contains 12 sticks for monthly use over 1 year / 36 sticks = 3 years\' worth