Marine Board HDPE (High Density Polyethylene) Plastic Sheet 1/2" x 24" x 48” White lor Textured 4.5 (59) $13892 $31.06 delivery Apr 13 - 18 5 left in stock - order soon. Utility Grade Marine Board HDPE (High Density polyethylene) Plastic Sheet 1/2" x 12" x 24” Black lor Textured 4.8 (493) $3652 $10.66 delivery Apr 13 - 18