... +/- 4% on thicknessFeatures of Wood Plastic Composites,WPC Construction Board 1) Recycled(at least about 25times)2) Light weight,waterproof, ... , drill , nail.ect 3. Can replace plywood , wood ,MDF,etc4. No easy indeformable 5. Light weight (than other woods ... self distinguishing lower than 5 seconds away from fire High quality WPC Construction Board Recycled Building Materail WPC Sheet Manufacturer