Capacity 120L 130L 140L 150L 160L Pipe Distance 75mm 75mm 75mm 75mm 75mm Vacuum Tube Specification "purple gold" coating ,058mm×1800mm ,built-in metal heat pipe. Bracket Bracket galvanized spray bracket / bracket tilted 45° Quantity 12 pcs 13 pcs 14 pcs 15 pcs 16 pcs Lighting Area 1.59m2 1.73m² 1.87m² 2.00m² 2.11m² Total Capacity 120L 130L 140L 150L 160L Net Weight 70.4kg 74.5kg 78.6kg 82.9kg 86.8kg Electric Heating (optional) Electric auxiliary heating power 2000W Heat Pipe Type Copper Heat Pipe Controller XK-3J or XK-5J TECHNICAL FEATURES CONTROLLER TYPE FAQ Q1: Is your water tank stainless steel tank or enamel tank? A1: We are chinese national high-techology enterprise and one of leading enterprise of enamel water tank in china with 15-year enamel water tank production experience and over 30 technology patents. All our water heaters are adopted enamel tank. we do not produce stainless steel water tank. Q2: Do your heater uses glass heat pipe or metal heat pipr? A2: We use copper heat pipe.The technology is the built-in heat transfer fin + copper tube heat conduction which made higher heat transfer efficiency. Q3: How long have you produced solar water heater and solar vacuum tube? A3: 15-year production experiences for solar water heater, 10-year production experiences for solar vacuum tubes . Q3: ODM and OEM available? A3: we have established long-term OEM and ODM partnerships with over 40 domestic and international clients.