Marine Board HDPE (High Density Polyethylene) Plastic Sheet 1/2" x 24" x 48” White lor Textured 4.5 (59) $13892 $31.06 delivery Mar 15 - 20 13 left in stock - order soon. HDPE Sheet High Density Polyethylene - Plastic Sheet 3/4" Thick 12" Length x 24 Width Black 4.1 (14) $2426 $50.00 $13.93 delivery Mar 15 - 20