1. natural material 2. sound and heat insulation 3. fire, water, sound proof ... acid, water, adhesive, etc.2) Product Description (size and thickness)Normal size: 2440x1220mm, 2400x1200mm 3600*1200, 3000*1200 ... Loading port: Qingdao port Origin: Shandong china6) Fuction, Advantage and UseSound insulation, heat insulation, moistureproof, fireproofs, water-resiatance, ... the T/T deposit or L/C. pvc ceiling