... 10% chemical additives (Anti-UV agent, Anti-oxidation agent, stabilizers, colorants, anti fungus agent, coupling agent, reinforcing agent, lubricants...etc.)This material is extruded ... so it is a kind of insect proof, green environmental responsible material.Main Features:The main features of this material ... WOOD, EASY YOUR LIFE! 2012 Fire-resistant waterproof and environmental protection wpc fencing