4 layers, 10-year warranty. New tanks with invoice and warranty. Tank specifications: Copper outlets embedded in the tank, thermal insulation, and manufacturing system is casting, not balloon. Homogeneous layers with each other. A tank designed to keep your water in a clean and healthy mold, preventing algae and fungi formation. It is washable from dust and sand accumulation. #خزانات_افقي #خزانات_عمودي #مشاريع #خزانات_5000 #خزان_ماء