HDPE Plastic Sheet Products & Suppliers Engineering360 Description: " thick) and pressed sheet (from 1 " through 4" thick). Quadrant's HDPE is stress relieved and available in: natural: 48" x 96" sheets with gauge sizes ranging from 1/16" to 4" natural: 48" x 120" sheets with gauge sizes ranging from 1/8" to 2" natural: 60" x 120" .