wpc railing post 1.Materail:Wood Plastic Composite(WPC) 2.Anti-UV,Waterproof,No Painting,Eco-friendly 3.Moisture Resistance wpc railing post Yongsheng WPC landscape material components:30% HDPE (Grade A Recycled HDPE),60% bamboo/wood fiber (Professionally treated dry bamboo/wood fiber),10% chemical additives (Anti-UV agent, Anti-oxidation agent, stabilizer, colorants, anti fungus agent, coupling ...