... ,10% chemical additives feels like natural wood,durable, color stability easy to install,100%recycle Yongsheng WPC ... % HDPE (Grade A Recycled HDPE),60% bamboo/wood fiber (Professionally treated dry bamboo/wood fiber),10% chemical additives (Anti-UV agent, Anti ... agent, lubricants...etc.).Main features:looks and feels like natural wood;Durable , firm because of its high density;high degree of ...