This document determines the fuel quality classes and specifications of graded densified solid biofuels produced from thermally treated biomass for commercial and industrial use. This document covers pellets and briquettes produced from the following raw materials (see ISO 17225-1:2021, Table 1): 1. Woody biomass; 2. Herbaceous biomass; 3. Fruit biomass; 4. Aquatic biomass; 5. Blends and mixtures. Subcategories of the above stated raw materials are included. This document does not consider products, which are marketed as charcoal or as charcoal products. For these products, ISO 17225-1:2021, Table 14 shall apply. NOTE Health, safety and environmental issues for solid biofuels are important and need special attention; however, they are outside the scope of this document.