... white poplar wood fiber) 10% chemical additives (Anti-UV agent, Anti-oxidation agent, stabilizers, colorants, anti-fungus ... agent, lubricants...etc.)Product Details: Product NameRecycled WPC wood plastic wall claddingSizes128x23mm, 130x14mm, 140x21mm, 150x20mm, 157x21mm, 185x30mm, ... nature wood.3. Waterproofing, fireproofing, Mildew-resistant, anti-UV.4. Less cracking, less warping.5. No need ...