Sandwich Panel manufacturer / supplier in China, offering 100mm PU PIR Rock Wool Exterior Prefabricated Wall Sandwich Panel with Metal Roof Panels for Warehouse, Modular Interior Wall Panel Polyurethane Sandwich Panel 100mm PIR PUR EPS Wall Panel for Cold Room, Fireproof 50/100/120/150/200mm Wall and Ceiling Insulation Board Building Wall Panels for Cold Room PIR/PUR/PU Sandwich Walls and so on.