Metal Column 20T To fulfill the need of our valued patrons, our offered Metal Column 20T comes in the different technical specification. Having weatherproof metal closure, this column is perfect for indoor as well as outdoor areas. In order to ensure its rust resistant nature, the cabinet of the column is coated with silver ash paint. Due to its smooth performance, this column is also known for providing a soothing sound. Apart from this, the provided Metal Column 20T is ideally suited for such places like halls, conference centers, airports etc.