20mm professional HDPE board export-HDPE board 4×8, Custom HDPE . China 20mm HDPE Dimple Plastic Drainage Sheet/Plastic Tri Description Material HDPE drainage board Thickness 0.8mm-2mm Dimple height 8mm, 12mm, 16mm, 20mm, 30mm, 50mm Width 1m, 2m. Tel: +8619937131062. Home » News » lored HDPE board » 20mm professional HDPE board export.