DescriptionMagnesium rod is mostly put in in heating tube of the flange plate, when the relationship is through including the flange gasket and magnesium rod insulation:Material: Magnesium alloyColor:Silver Tonelength: 160/200/250/300mmrod diameter: 16/18/20mmscrew diamter:5mm/6mm(0''/0'') (tips: before you order, please verify the size of your need.)Use: Magnesium Anode Rod can be use for Water boiler, Heat exchanger, Vapourater, Boiler content:1 X Magnesium Anode Rod