Commodityregular solar water heater Materialinner tank: imported stainless steel (sus304/2b) Outer tank: galvanized steel alloy Bracket: 1.5mm Heat insulation layer: imported polyurethane (bayer, germany) Thicknessinner tank: 0.4mm Outer tank:0.4mm Bracket: 1.5mm Heat insulation layer: 50mm Working temp.99 celsius degree Working press.0.3mpa (3 bars ) Colorationas per Certificateiso9001:2000, ce Warranty5 years for full system / 15 years for vacuum tube Moq20'gp Lead timewithin 15 days for full container Payment telegraphic transfer (t/t), letter of credit (l/c) Carton