solar energy water heater,solar heating system,vacuum tube solar water heater:for household,school,enterprise,government,swimminÿSpecifications: 1) Tanka) Outer Tank material: galvanizedÿarmor plate.b) Inner Tank material:ÿ imported SUS304-2B food grade stainless steel.c) Water Tank Diameter: ÿè410/420/460/470/480/500/520mm.d) Insulating layer: ÿ55-60mm polyurethane foame.e) Tank Capacity: ÿ90/110/150/180/200/210/240/300/350L.ÿ2) Vacuum tubea) Dimension: è47*1500mm/è58*1800mm.b) Material: high boron silicon 3.3 glass.c) Qty:ÿ16/18/20/24/30/36 pcs.d) Hail resistance diameter: è25mme) Tube coating: by AL-N-AL or ALN/AIN-SS/CU.ÿ3) Bracketa) Material:ÿcolor armor plate.b) Thickness: 1.5mm.c) Obliquity: from 38o to 45o .ÿ4) Certificates: ISO9001:2000,CCC,CE