Uline Polyester Strapping - 1/2" x .020" x 3,600', Green S 16 x 3" CORE Replaces steel strapping for medium and heavy-duty applications. 66% less expensive than steel. 80% lighter, easier to use. Less elongation than poly, more flexibility than steel.ULINE offers over 38,500 boxes, plastic poly bags, mailing tubes, warehouse supplies and bubble