If you are constantly sending things in the mail but find yourself without the proper shipping containers, then a solution has arrived! These Mailers4U poly mailing envelopes are perfect for shipping small items via Fedex, UPS, USPS, or DHL. The self-sealing adhesive also makes packaging your items for shipment fast, easy, and secure. All bags have a durable, 2.4mil thick poly material that resists tearing and punctures, meaning electronics or sharp items will not be compromised while being shipped. These bags have a professional appearance, making them ideal for personal and professional use at home or in the office. These mailers are grey in color and do not allow contents to be seen through the walls like some lighter colored envelopes do, giving your items resistance from light damage and plenty of privacy. Order now and get the mailing bags fit for any item! Includes 400 mailers. Mailer walls are 2.4mil thick.