... the following spare parts, it will be better!A. Controller----It can controll the water level, displays temperature, back ... 82,98,110,136,156Kg vacuume tube technical parameter Length (nominal)1800mmOuter tube diameter58mmInner tube diameter47mmGlass thickness2.25mmMaterialBorosilicate ... heater bracketstainless steel/Galvanized steel/Aluminium alloy 2013 High Quality Pressure Solar Water Heater System