Standard input-output norms for high-voltage porcelain insulators specify allowable inputs and compliance requirement that imports match export use. Standard input-output norms prescribe required inputs and permissible quantities for manufacture and export of specified high-voltage porcelain insulators, listing raw material, metal component and fuel allowances per 1000 kg porcelain body and per net weight where applicable; Zinc Sleeve Ball Pin Insulator has a specific higher zinc allowance, and applicants must ensure imported inputs correspond to those used or required in the exported product.