... combination of polypropylene (34%), wood fiber (60%), and some additives (6%) by using special extruding equipments. ... , no pollution, low formaldehyde, 100% recyclable Durability: waterproof, moldproof, mothproof , rotproof and 15 years service lifeDecorative effect: strong ... to install and clean, no glue and low maintenance cost Water proof and environmental protection WPC railing for outdoor use ...