About this item Opaque Poly Bubble Mailers:The black bubble mailers outer size is 5x6 inch, while the inner size is 4x5.9 inch.With full air bubbles, our bubble mailers can protect your value products from damage caused by external impacts. The inner lining is using thickening film, even if there is strong light, the items in the bag cannot be seen, which can protect your privacy well. Self-Adhering Envelopes:Tear resistant envelopes,with super strong viscosity,can be end-to-end bonding,without the need for tape reinforcement.Unless you tear the padded envelopes,it will not spread in the process of transportation,improving the safety of product packaging. Multipurpose Bubble Mailers:Our bubble mailers is much stronger than paper envelope, providing the best protection for irregular and sharp shaped items during transportation. You can use them to mail cosmetics,fashion accessories,jewelry,medicines,etc. High quality shipping envelopes keep them in good condition during transportation and make your customers receive satisfactory products. PREMIUM QUALITY: Self sealing packing mailers are made with the highest-quality, structurally sound materials to provide visual enhancement and security. Cushioned envelopes are lined with 80gsm bubble, with unique air cellular layers and 360 strong air bubble technology helping absorb shock during shipment. These heavy duty mailers are tough enough to take on long, rough shipments with multiple processing centers and handlers without risk of penetration. Weatherproof cushion envelopes.