Small Freezer Body for Van/Truck/Motorbike Refrigerator Box Small Refrigerated Truck Box designed for optimal thermal insulation and durability in commercial refrigeration applications. Material & Performance New type FRP (Fiberglass Reinforced Plastic) used for outer and inner skin Sandwich panel construction with extruded polystyrene foam core for superior thermal insulation Panels fixed to steel frame with high-strength adhesive and rivets for structural integrity