size:145mm x 17mm hollow normal usage: as the outdoor decking weight per meter:2.2kgs The main features of the WPC profiles:1:high recycled,eco-friendly,saving forest resources.2:natural timber style, but less timber problem.3:no requires for glue ,painting and low maintenance.4:termites,insects and moldy-proof.5:weather resistant,suitable from -40 to +60 degree.6:barefoot friendly ,anti-slip.7: ...