CLARITY by Nello Wall: An American-Made Movable Wall Manufacturer Movable Wall, Movable Wall Systems, Demountable Wall, Storefront, Glass Office Fronts, Glass Systems, Glass Wall Systems, Wall Systems For more than four decades, Nello Wall Systems has been the authority in interior glass and movable walls. Renowned for their attention to detail, innovative designs and sophisticated engineering, CLARITY by Nello Wall supports designers, architects, general contractors and developers to See Their Vision Through.