8 x 14" - 4 Mil Flat Poly Bags. These heavy-duty clear, lay flat open top plastic poly bags are perfect for heavy weight products like industrial parts and tools. Poly bags are manufactured from 100% virgin, high clarity low density polyethylene (LDPE) film. Manufactured with a durable bottom seal for optimal strength. Meets FDA and USDA specifications for contact with food products. Close bags with bag tape, twist ties, or by heat sealing. Select from many different flat poly bag sizes and mils to fit your packaging, shipping, displaying and storage needs.