... natural fiber(wood powder,bamboo powder,etc)10%additives(Anti-UV agent, Anti-oxidant,stabilizers ,colorants,and etc.)Surface treating methodBrushing ... splitting5. Water-proof, moldy-proof, prevents rotting and moisture, anti-acid, alkali and pest resistance6. Environmental friendly, fully recyclable ... ,32mm,80mm,90mm,120mm etc.3.Length: Customized 2012 new style wpc/ wood plastic composite-(waterproof)