Balsa is extremely light. It has unique cell structure ,light weight and high strength.it is an ideal material for structural sandwich. Balsa sandwich material is a structural sandwich material made from Balsa cross-section. The products are processed by drying, sterilization. splicing. slicing and surface treatment. Lts strength and stiffness are better than all kinds of foam, and is one of the common varieties of core material for wind turbine blades.