All-paper structure which is environmental-friendly and tough; Strong seal closure which ensures good seal and improves the packing efficiency; White appearance which is artistic and easy to print; Smooth inside so the articles can be put into it easily; The most important characteristic: can be used twice to save resources; Lightweight, postage-saving; The specifications can be customized according to your requirement; Applications: literary works, magazines and books, printings, financial reporting, office supplies, pictures, stationeries, etc. The size :215*280m-360*480mm.