1/8 inch machinable HDPE board for Landfill Engineering-HDPE machinable sheet of hdpe 1/8″ supplier-10mm-50mm HDPE Sheet Piedmont Plastics offers HDPE for cutting boards in three standard sheet sizes: 48” x 96”, 48” x 120”, and 60” x 120” in gauge sizes ranging from 1/4” to 1”.