Offers solar water heater.Material: imported sus304-2b food-level stainless steel, thickness:0.310.5mm outer tank: high quality coated steel, thickness:0.310.5mm insulation: 5055mm polyurethane foamvacuum tube: cuss-aln red tubeframe: coated steelaluminum alloy, thickness:1.22mmreflector: stainless steelaluminum alloy as optionavailable accessories: feeding tank, solar controller, electric heater, mag rod, thermostatic mixing valve 3, size range: item.no specification effective light area tank's capacity application people cbmdiameter of water tank qty of tube(pcs) diameter of tube length of tubez-nc5810 460mm 10 58mm 1.8m 1.04 100l 4 0.37z-nc5812 460mm 12 58mm 1.8m 1.25 120l 4-5 0.44z-nc5815 460mm 15 58mm 1.8m 1.56 150l 6 0.56z-nc5818 460mm 18 58mm 1.8m 1.87 180l 7-8 0.64z-nc5820 460mm 20 58mm 1.8m 2.08 200l 8 0.7z-nc5825 460mm 25 58mm 1.8m 2.61 250l 10 0.89z-nc5830 460mm 30 58mm 1.8m 3.13 300l 12 1z-nc5836 460mm 36 58mm 1.8m 3.75 360l 14-15 1.3z-nc5840 460mm 40 58mm 1.8m 4.17 400l 16 1.4z-nc5845 460mm 45 58mm 1.8m 4.69 450l 18 1.6.