Ideal for Modeling, Crafts, and DesignAlso known as channel beams, these beams feature a 1mm wide, 2mm deep groove along one side which results in the U-shaped cross-section. They are strong against torsional forces and can be used to construct or reinforce buildings for dioramas or desing projects. They may be cemented together with plastic model cement and painted with plastic model paints. Length: 40cm.