shower water heater 1.Stainless Steel &Unpressurized 2.Certificate:CE,ISO 3.Warranty:5 years 4.Dilivery:in 15 days shower water heaterSpecification:Inner tank: Food grade stainless steel SUS304/2B, 0.4mm thickness. Outer tank: stainless steel SUS304/BA, 0.3mm thicknessFrame:stainless steel, 1.5mm thickness. Insulation: Polyurethane frothing, 50mm thickness. Vacuum tube: Tri-elements(AI-N/SS/CU) ...