... , fence and railing.Component: 30% HDPE (Grade A)60% poplar wood powder (professionally treated dry white poplar wood ... coupling agent, reinforcing agent, lubricants...etc.)Product Details: Product NameWPC exterior wall panelSizes128x23mm, 130x14mm, 140x21mm, 150x20mm, 157x21mm, 185x30mm, 225x16mm, ... wanted size.7. Weather resistant, suitable from -40 to 60°C.8. Easy to install, clean.9. Low maintenance ...