... .sound insulation 4.environmental protection 5.energy conservation exterior wall panel :lengrh: 3800mmwidth:380mmthickness :16mmweight : 3.7kg/ m2 ... , heat preservation, moistureproof effect Product description :Thw wall Panel is a kind of high resist compression , shockproof , ... wind resistance; 11. Fire retardant,12. The wall Panel designs has thermal double channel, with breathing type ventilation ...