... anti correction no pollution,easy installation Solar keymark, CE, CCC pressurized solar water heaterparts of production pictures More ... 0.55mm10, material of outer tank: porcelain/silver pearlescent plate/color steel11, heat insulation layer: imported polyurethane12, thickness ... of heat insulation layer: 50mm to 60mm13. pressurized system: 0.6MP14, material of support: Aluminum Alloy15, color ...