Features:_x000D_ _x000D_ Magnesium rods, also known as anode rods, are mainly composed of magnesium. In the water heater liner, it and the inner liner (mainly iron) are in contact with water at the same time, forming a primary battery due to chemical principles. _x000D_ Since the water in the inner tank is not pure water, it always contains various impurities and has certain corrosiveness. When the water temperature exceeds 40 C, scale will be generated. If there is no magnesium rod, the inner tank will be corroded. _x000D_ With the rod,your inner liner will have longer service life since less incrustation will be generated. _x000D_ Simple installation and easy to use,very convenient. _x000D_ Mainly used in water boiler, heat exchanger, evaporimeter, and boiler and so on. It has properties of softing water, de-dirt residual ,en-longing the working life of container. _x000D_ _x000D_ Specification:_x000D_ Material: AZ31B Magnesium Alloy _x000D_ Standards: EU Environmental Standards_x000D_ Size: 21X320mm/0.83*12.6in_x000D_ Thread: NPT3/4_x000D_ _x000D_ Package List:_x000D_ 1*Magnesium Anode Rod