Gas holders, also known as gasometers, are large TANKS used to store and distribute natural gas. They are typically constructed from steel and are designed to hold a large volume of gas. Gas holders are often used in industrial settings, such as factories and power plants, to provide a steady supply of gas for operations. They can also be used to store gas for residential use. Gas holders are an important part of the natural gas infrastructure and are essential for providing a reliable source of energy.