Product Name: (special decoration ceiling board) 1)Material:galvanized steel or aluminium. 2)The biggest of single board :1,600x4,500mm. 3)Thickness:1.5,2.0,2.5,3.0,3.5.4.0mm 4)Surface coating:outdoor polyester powder coating 5)Style:plain.perforated.surface transfer printing or as per your request 6)Quality guarantee:surface color stable 10 years for indoor useProduct Merit: 1)Light but high rigidity and consistency,strong corrupt proof.weather proof and chemical proof 2)Good plasticity 3)Surface smoothness and easy cleaning 4)Easy fix and install 5)Surface color stable for 10 years by indoor use 6)Use recycle material, environmentally friendly 7):Flexile size and shapeRecommend places for application below 1)Building exterior.pillar and terrace 2)Air port/ bus station 3)Auditorium.music hall 4)Sport center 5)Reception hallAcoustic ability: 1)Perforated with SoundTex paper 2)Absorb modulus:NRC=0.7 3)Acoustic level: a)Plain:CAC=40dB b)Perforated:CAC=24dBFireproof ability:pass British Standard Institution fire test (BS476) If you're interested in our products, please contact us! We'll supply you with the best product and sevices