... thickness11.Magnesium rod keeps the water quality(soft water).12. Accessories: P/T valve, Mg rod, Sensor, Controller, Electric element, Pipeline, Fittings.etc ... shipping). On one hand, the vacuum tube is glass product, if through air express, the airport convey is imbrutementthe,so ... .5 Specially-made We can create new model solar water heater suited to your market accord to your request.Commercial ...