Sina Stars Industry and Trade. The outer layer of the outer layer of the outer layer of the outer layer of the outer layer of the outer layer of the outer layer of the outer layer that the atmosphere layer consisting of a new white layer and developed for the production of water tanks. With the external radiation and the smooth white inner layer, the external water forms bacteria and algae inside. As for the stainless steel tanks (Star Steel), it is manufactured from stainless steel, which gives quality and does not rust or corrode, which helps the bacteria to remain clean. The tank has the approval of the Ministry of Health, which is the educational buildings and the National Research Center There are also the latest advanced mechanical safety floats made of PVC with diameters ranging from half an inch to 2 inches and designed only to prevent water from leaking easily into the tanks.