Input-output norms define required inputs for tungsten wire exports; importers must ensure imported goods match those used. Standard input output norms for Tungsten Wire (Clean) list 1 kg of resultant product and require inputs of 1.12 kg tungsten wire above 0.9 mm and 0.10 kg colloidal graphite (20% solids). Applicants must ensure imported goods match the inputs actually used in the export product and the schedule determines permissible input proportions.