domestic solar water heaters Specifications:1) Thickness of bracket: 1.5mm2) Heat-pipe vacuum tube: 58 mm x 1.8m 3) Inner tank: SUS304-2B food grade stainless steel4) Outer tank: steel (spray-paint and looks like china paint)5) Capacity: 98/110/130/150/180/210/240/300/300L6) Ins...