Filing cabinet on feet. Supporting structure made of profiled first grade 6/10 thick steel sheet. Reinforced doors with upper and lower ventilation slits. Special internal burglar-proof hinges. perimeter rounded edge anti-shock anti-radius mm 6 Longitudinal ribs on sides and doors. Buttonholes on the roof to allow excellent air circulation. Surface treatment: by means of heavy iron phosphate as a preparation for painting which takes place by anodic electrodeposition with guaranteed thickness in every part of the piece of furniture. 180 ° oven crosslinking. Paints: acrylics with high corrosion resistance according to A.S.T.M.B. 117.64 and succ.var.