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Metal groove shape board Details: Material: Galvanized steel or aluminum metal groove shape board is mainly for the ourtside wall Packing: Standard carton with XINJING mark (can add bubble and hard paper for protect products) Quality guarantee: We guarantee the surface color stable for 10 years by indoor use. XINJING offer kinds of ceilings for client, we also offer interior design and machining service.Merit: Surface smoothness and easy cleaning High precision, rigidity and consistency Strong corrupt proof, weather proof and chemical Surface color guarantees 10 years for indoor use. Flexible suspension system make each ceiling tiles easy install and disconnect Easy to match lamps or other ceiling partsRecommend applying in these places below: Supermarket, marketplace Service station, toll station Underground, air port, bus station School, office, meeting room Hall, corridor and toilet Sport centreClean place are much better: Office, store, plaza Hotel, restaurant, kitchen HospitalAcoustic ability: Perforated with SoundTex paper Absorb modulus: NRC=0.7Acoustic level: Plain: CAC=40dB Perforated: CAC=24dBFire proof ability: British Standards Institution fire test pass (BS476).