Revolving Filing System Description: Each shelf can be rotated to 360 degree; two level shelves can be added up to five shelves; adjustable dividers for multi-purpose filing; fixed dividers Model and size(mm): WBC-02--(Diameter) 823*H1025, 2 levels WBC-03--(Diameter) 823*H1425, 3 levels WBC-04--(Diameter) 823*H1850, 4 levels WBC-05--(Diameter) 823*H2250, 5 levels