Sunchaser 30-tube Solar Hot Water Heater/collector Vacuum Tube Dimensions of evacuated tubes: 58mm(OD) x 1800 mm (Length), about 2.3" x 72". Dimensions of collector: 50" (W) x 79" (H). Weight of collector: 130 lbs Manifold Pipe Material: Copper Heat Pipe Material: Copper Manifold Pipe size: 1" threaded (male) Tube Material: Borosilicate Glass Coating of Glass Absorber: AL-N-AL, Copper, Stainless Steel Heat Transfer Fin: Aluminum Fin Insulation Material: Rock Wool Frame Material: 6063 Aluminum Alloy Manifold Casing Material: 6063 Aluminum Alloy Max Operation Pressure (Bar): 6 Warranty: 5 Years 2 ore more collectors can be connected to each other to create collectors of 32 tubes or more for more heating capacity.