Place fragile items inside these poly mailers for added protection during mailing. The sturdy poly construction offers resistance to moisture, and the self-adhesive closures hold contents securely in place. A white exterior color helps shipping labels stand out for easy viewing. These Coastwide Professional 7.5 x 10.5-inch white poly mailers come in a 1000-count carton, providing an ample supply for bulk order processing..Elongation at break: 300% (min).Single use self-sealing closure.Tensile strength: 4.5 lbs./in.(min).Overall outside dimensions could vary.Opens easily with a tear strip.Bottom or side seam: 3.8 lbs./in (min).High strength seams keep contents secured even when overstuffed.Handle business shipments with these Coastwide Professional 7.5 x 10.5-inch white poly mailers..Strong polyolefin mailers are water, puncture, tamper and tear resistant. White outer surface and a silver lining provide for excellent opacity. Self-Seal lip and tape provides quick and easy closure. Color White Outside / Grey Inside Exterior Material Polyolefin Mil 2.5 Qty.