... environment-friendly The terracotta panels are extruded into shape from quality pure terra cotta. It is radioactivity-free, environment-friendly ... technology and equipment, every panel has precise measurement and stable quality. 4. Good fireproof and anti-freezing The products have ... of the reporttested value of the report Shutter Terracotta Panel ISO9001,KOREA,JAPAN,EU,USA 300X600(300-1200)mm,J30- ...