1. key word: WPC Stair railing 2. 5 color avaiable 3.CE & ASTM , RICH certificate 4. Water proove, anti-UV. 5.Eco-friendly 5 colors avaiable. The Eco-friendly wood plastic composite outdoor decking/flooring we produced is made of: 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, ...