Material: Extruded Polystyrene (XPS) 擠塑聚苯乙烯 All the boards have a thickness tolerance of +/- 5 mm. The high density foam board will have color shade.所有板厚度會有誤差正負5 mm之内。高密度板會有色差。 The surface of this foam board is uneven. After you buy it, we will randomly pick one for you.這種板的表面不平整。 購買時，不設代選擇。 The thickness and size of all products are subject to the actual product.全部產品的厚度及尺寸以實物為準。