Compact Non-pressureSolar Water Heater Elegance Series MODEL Inner Tank Outer Tank Collecting Area() Vol (L) GW(kg) Quantiy20/40 Material Material LQ-420-47/1500-15 SUS304 ZINC&AL 1.65 85 62 67/139LQ-420-47/1500-18 SUS304 ZINC&AL 1.98 100 65 60/120LQ-420-47/1500-20 SUS304 ZINC&AL 2.20 111 70 55/110LQ-420-47/1500-24 SUS304 ZINC&AL 2.64 133 78 46/92LQ-420-47/1500-30 SUS304 ZINC&AL 3.30 166 88 38/76 LQ470-47/1500-15 SUS304 ZINC&AL 1.65 112 65 58/120LQ-470-47/1500-18 SUS304 ZINC&AL 1.98 140 72 52/104LQ-470-47/1500-20 SUS304 ZINC&AL 2.20 150 83 47/94LQ-470-47/1500-24 SUS304 ZINC&AL 2.64 180 96 42/84LQ-470-47/1500-30 SUS304 ZINC&AL 3.30 226 115 35/70 LQ-470-58/1800-16 SUS304 ZINC&AL 2.30 135 71 47/94LQ-470-58/1800-18 SUS304 ZINC&AL 2.70 150 85 44/88LQ-470-58/1800-20 SUS304 ZINC&AL 3.00 165 92 39/78LQ-470-58/1800-24 SUS304 ZINC&AL 3.60 200 112 35/70LQ-470-58/1800-30 SUS304 ZINC&AL 4.50 250 132 28/56LQ-470-58/1800-36 SUS304 ZINC&AL 5.40 300 152 25/50Features: 1. Inner tank :stainless steel 304 2B,thickness 0.4mm. 2. Outer tank: Zinc& Aluminum Coated Steel 3. 420 and 470 are the diameter of the water tanks. 4. Frame: Zinc& Aluminum Coated Steel 5. 47 and 58 are the diameter of vacuum tubes. 1500 and 1800 are the lengthof the vacuum tubes. Tube color is blue or black 6. Insulation layer: 55mm polyurethane foaming.Detail of Solar Water HeaterCompany Honor