Normally, metal honeycomb panel is aluminium honeycomb panel which has similar structure to ACP, the difference is that its core material is aluminium honeycomb. Compared with ACP and solid aluminium panel, aluminium honeycomb panel has more advantages,for example, it's ligher and flatter than solid aluminium panel, it has better fire-resistance than ACP...So, this material is called the best curtain wall material in 21st Century.