IBC tank material:LLDPE, food grade raw material, ISO 9001:2000.One stage rotational mold.Anti-shock and UV proof and healthy. IBC tankmaterial: LLDPE ,FDA approved food grade raw material ,one-stage rotational mold outline border: welded steel pipe,fence-like structure,hot-galvanizecollet: galvanized steel plain sheet,compression mouldingISO9001:2000 IBC tank