1,Manufacturer of solar water heater 2,OEM service 3,Much low price,high ... of inner tankSUS202 , 1.2 mmmaterial of frameThree high vacuum tube , ALN/AIN-SS/CU , 1800mm, 58mmtype of vaccum tube24 & 30the ... : 55 mm , 32 kg/m3Heat insulation of water tank all stainless steel solar water heater