grey hdpe polythene sheet 20mm application Polyethylene - High Density (HDPE), sheet, thickness 20 mm . Polyethylene - High Density (HDPE), sheet, thickness 20 mm, size 300 × 300 mm; Synony: ET323360; find -GF64805968 DS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich