8.5X13.5 inches Poly Bubble Mailers #3 Self Sealing Padded Envelopes Small Business Shipping Supplies this thickness is stronger than

this thickness is stronger than 1 Mil or 1

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tamper-evident

These bags are sized at 12 inches in width 18 inches in length (304

8.5X13.5 inches Poly Bubble Mailers #3 Self Sealing Padded Envelopes Small Business Shipping Supplies this thickness is stronger thanPoly Bubble Mailers #3 Material: Low Density Polyethylene (LDPE) Color: White with Gray Interior Product Dimensions(in): 8. 5 Inch (width) X 13. 5 Inch (length) Product Dimensions(mm): 215. 9mm (width) X 342. 9mm (length) Closure: Self Seal Strip Just peel and seal Strip Usage: Shipping Fragile Items Bubble thickness: Polyethylene 1 8 Bubble Features: Made from durable Polyethylene material with a water resistant exterior for added protection