The Tuff Tank II™ is a UN31HA1 composite IBC. The Tuff Tank II™ is approved for shipment of hazardous materials as authorized in 49 CFR 172.101, Table of Hazardous Materials and Special Provisions. The Tuff Tank II™ is built in accordance with IMO section 26 and can be used per Appendix 1 to section 26. NMFC Item 41024, Sub 3, Class 125.