Ningbo Plastic Extrusion Plate Ningbo Zhenhai Hengfeng Thermal Insulation Material Co., Ltd. is specialized in the production of XSP plastic extrusion plates, which are applied to the internal and external house thermal insulation as well as used as the protection layer for airport, squares, railways and express way. The company introduces foreign production equipments and full sets of production lines, equipped with automatic cutting specifications, which are in line with customer demands. The company integrates production, sales, design and construction together.