park and garden wpc bridge handrail weather resistance Waterproof,longevity Safe,Natural feel Anti-slip Well and High Quality ... powder, etc)10% chemical additives. (Anti-UV agent, Anti-oxidation agent, stabilizers,colorants, anti fungus agent, coupling agent, reinforcing ... ,high strength and elegant looking 2.Anti-corrosion,anti-crack,anti-deformation3.Water proof,Easy to maintainance and clean4. ...