1. Color steel wall sanwich panels are good at heat proof 2. ISO9001 3. beautiful apperance ... easy instal The color steel high quality wall sandwich roof panels are used for roof of prefab house, steel structure warehouse ... steel plate: 0.3 to 0.6mm Middle: PU board, EPS foam, rock wool, fiber glassThickness: 50mm, 75mm, and 100mm, ... warm keeping, and it is in low price Color Steel EPS Sandwich Panels