PRODUCT FEATURES Made of high strength & Supreme Quality of Galvanized Metal Sheet. Complete In House Manufacturing Process. Tested as per is - 277. Heavy duty earthing terminals - to avoid shock. A galvanizing layer of zinc provides better protection from corrosion range from 120 GSM to 350 GSM. Higher weather resistance than M.S modular box. Longer life than PVC as well as M.S modular box. Sturdy structure. Tested for 240 hrs salt spray test and load test by third party lab.Specialized application of GI Boxes in a€?Aluminium Foam work Shuttering Systema€? known MIVON.