U.N. Certified for 66 lb. Solid - 1H2/Y30/S/yr. of mfg. USA/M&M. The 6.5 Gallon is uniquely designed for 66 lb. or more of hazardous or solid product for which U.N. Certification is necessary. In many cases, the easy-to-use lid is ideal for products which do not require the U.N. certification but a product ideal for consumers.