Feels like natural wood;durable, color stability;easy to install;100%recycle;strong cast iron structure 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 agent, reinforcing agent, lubricants ...