WPC exterior wall panel Poplar fiber, HDPE Looks like nature ... coupling agent, reinforcing agent, lubricants...etc.)Product Details: Product NameWPC exterior wall panelSizes128x23mm, 130x14mm, 140x21mm, 150x20mm, 157x21mm, 185x30mm, 225x16mm, OptionalLength2 ... .4m, 3m, 3.6m, 5.8m, OptionalColorsGreen, brown, red, grey, black, red brown, teakwood, redwood, red, yellow. OptionalSurfaceSanding, brushing ...