... .width:950mm 5.length:depends on you Our sandwich panel is widly used in steel workshop, easy building, prefab building, civil buildng, prefabricated ... , it is consist of two parts, the one is glass steel, the other one is polyurethane. it has excellent ability to ... and typhoon.For the thickness of exterial and interial steel is 0.286mm, the polyurethane can be 50mm, 75mm, 100mm. 150mm. sandwich panel