Probably the most convenient way of keeping your drains clean, Ecozone Enzymatic Drain Sticks use enzymatic power to prevent build ups in your drains and to eliminate odours. Effective and innovative the Drain Sticks break down almost anything that causes blockages and bad smells in the kitchen and bathroom. They are perfect for use in any sink that has an U bend. Product advantages: So Easy to use, simply pop 1 stick down the plughole where it will stay in the U bend, slowly releasing enzymes that break down any potential hazard that could form a blockage in the U bend. Economic, each pack contains 12 sticks sufficient to use for 1 year. Long lasting effect, each stick will last for 1 month. Safe to use with septic tanks. Approved by The Vegan Society. Non-toxic. BUAV approved. Note: These are Not corrosive acid based unblockers that can provide instant results, dissolve hair and damage your pipes. Used regularly, this product will maintain a free-flowing drain. If you have a seriously blocked drain Ecozone recommends to contact a plumber as opposed to using highly toxic products that are harmful to you and aquatic life.