Poly Mailers White Bulk Shipping Envelopes Self Seal Adhesive Waterproof and Tear Proof Postal Expandable Polyethylene Poly Bag Mailer for Business PackagingTop Quality，Free Shipping，Best Price，USA Seller，Fast Shipping Feature:Fabulous for shipping a wide variety of items.High-Quality Self Sealing Mailers.High adhesive seal strip—packages are tightly secured after 3-5 minutes sealed.Inks, stamps, labels adhere easily.Puncture resistant & tamper/waterproof. Pressure-sensitive adhesive provides a high strength durable closure, water, and dirt resistance. Provides excellent protection during shipments.Lightweight saves on postage Excellent Application for UPS, USPS, FedEx, DHL, and More Item Specification: 9 Sizes to choose from: 6″ x 9″，7.5″ x 10.5″，9″ x 12″，10″ x 13″，12″ x 15.5″，14″ x 17″， 14.5″ x 19″，19″ x 24″，24″ x 24″ Quantity: 50 , 100 , 200 , 250 , 400 , 500 ,1000 PCS Adhesive: Synthetic rubber – Hotmelt, ½” minimum +/- 1/4”. Lip Size: 1.5”-2.5″ (+/- ¼”). 2.5 mil thickness (+/- 5%). Liner: Clear with antistat. Opacity: Business cards inside the mailer should not be visible under UV light. No Bubble or Padded Inside Package Includes: Size + Quantity (you’re chosen) Poly Mailer Mailing Bag Top Quality，Free Shipping，Best Price，USA Seller，Fast ShippingBuy With Confidence!