HDPE drainage board 1.Materail : HDPE 2.High compressive strength ,Light weight , fast Drainage , breathe,anti-aging Drain ... Graden , High compressive strength. Together with geotextile, Drainage, waterproof, breathe freely, protect wet.The advantage ... is completed, began to shop installs drainage plate. The drainage slope requirements 2‰~5‰2. Green ... .40320SY-PE20HDPE20320 12.80420 HDPE drainage board