30%HDPE,60%wood fiber,10% chemical additives feels like natural wood,durable, color stability easy to install,100%recycle ... % HDPE (Grade A Recycled HDPE),60% bamboo/wood fiber (Professionally treated dry bamboo/wood fiber),10% chemical additives (Anti-UV agent, Anti- ... , lubricants...etc.).Main features:looks and feels like natural wood;Durable , firm because of its high density;high degree ...