4 layers, 10-year warranty. New tanks with invoice and warranty. Tank specifications: Copper outlets embedded in the tank, thermal insulation, and manufactured by casting (not balloon molding) with homogeneous layers. The tank is designed to keep your water in a clean and healthy container, preventing the formation of algae and fungi. It is cleanable from dust and sand accumulation. #خزانات_افقي #خزانات_عمودي #مشاريع #خزانات_5000 #خزان_ماء