1/8″ hdpe polythene sheet for Float/ Trailer sidewallshenan okay.com: Sheet, HDPE, Black, 1/8 In T, 24 x 48 In. 5 Pack 12 x 12 x.125 Black HDPE Sheets, Great for DIY Projects for . 15mm polyethylene plastic sheet for Float/ Trailer sidewalls. PVC Grey Sheet 3000 x 1500 x 12mm. Our Price: £526.98 ( £632.38 inc VAT) Quantity.