Product Name:Special ceiling board: 1)Material:galvanized steel or aluminium. 2)Largest size of single board:1,600x4,500mm 3)Thickness:1.5, 2.0, 2.5, 3.0, 3.5, 4.0cm 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 for 10 years by indoor use Product Merit : 1)Flexible size and shape 2)Individuation and unique design 3)Surface color stable for 10 years by indoor use 4)Light but high rigidity and consistency.strong corrupt.weather proof and chemical proof 5)Surface smoothness and easy cleaning 6)Use recycle material, environmentally friendly Recommend place for application below 1)Building exterior.pillar.terrace 2)Air port/bus station 3)Auditorium.music hall 4)Sport center 5)Reception hall Acoustic ability: 1)Perforated with SoundTex paper 2)Absorb modulus:NRC=0.7 3)Acoustic level: a)plain:CAC=40dB b)perforated:CAC=24dB Fireproof ability:pass British Standard Institution fire test (BS476) If you're interested in our product (special ceiling board),plesase do not hesitate to contact us,we'll supply you with the best service and product!