size 140*21mm composite deck material: 50% Wood powder 38% Plastic (HDPE) 12% Additive Decking board length: 2.2M, 3.6M, 4.8M or customized Composite deck Lifespan: 25-30 years Coowin Group is one of the most professional composite decking manufacturer from China, series products including plastic lumber wall cladding, plastic timber flooring,composite decking, composite siding, plastic composite decking, wpc fencing,wpc decking, wpc deck floor, wood plastic railing, plastic wood fencing, wpc pergola, wood polymer composite flower box, maintenance free sign board, water proof trash can, fire resistant wpc ceiling, all you can dream, we can make it. Should you have any questions pls feel free to contact Blinda.