1.own manufacturing plant 2.100% new material,non-toxic, ... 10mm on length +/- 4% on thicknessFeatures of Wood Plastic Composites,WPC Construction Board 1) Recycled(at least ... about 25times)2) Light weight,waterproof, Antiflaming and self-extinguishing, ... than 5 seconds away from fire High Quality WPC Hollow Board Plastic Building Material Soundproof WPC Foam Board ...