Bankers Box City Box 30+ Years Acid Free Cardboard Transfer Box File Pack of 50 7771001Designed for institutions and municipalities with strict archival requirements, this heavy duty manual transfer box file is made from acid free corrugated cardboard to ensure safe, long term document storage. Fully compliant with ISO 16245 Type A standards and certified to ICN Standard 3, it guarantees document retention for a minimum of 30 years. Ideal for storing paper or parchment records in accordance with the Public Records Act, the box is