... Compared with the traditional sense of metal ceiling tiles,for its lightweight,anti-aging,waterproof,user-friendly andenvironmental-friendly ... .etc.and this material has been widely used for hotels design and decoration,commercial buildings,hospital,schools, ... .75kg.3.8kg5)Main material:PVC,Calcium carbonate6)Certificates:ISO9001:2000,SONCAP Certification,SGS.Test Agency :INTERTEK. Shipment & Packing ...