High quality galvanised steel. 100kg Capacity per level giving a total 500kg capacity per rack. The unit can be increased to 1000kg by ordering the optional reinforcement bars AP2939/1 giving maximum 200kg per shelf (see below). No nuts and bolts means no tools required to assemble. The five shelves can be positioned at various heights and can take hanging files without any modifications. Units can be added to by ordering the extension bay kit AP2939/E.