Valued Packing: 30 Pcs black bubble mailer measuring usable size 10in x 13in/254 x 330mm Durable Self Seal: Self-sealing, gummed flap closure. Once the envelope has been sealed, it cannot be opened without visible signs of tampering Padded Envelope: These bubble mailers feature a bubble wrap lining protects sensitive objects like sensitive and fragile items, including jewelry, books, toys, electronics and pharmaceuticals Moisture and Puncture resistant: Poly bubble mailers are fully plastic, so you will have bubble wrap protection and waterproof packaging Colour: If you want a more professional look for your mailer, opt for a white or black finish.Poly bubble mailer come in all sorts of colors if you are looking for something with a little extra flare Why Choose a Bubble Mailer? If you have something fragile youre trying to ship or want extra peace of mind when mailing an item, choose a bubble mailer. Studies show that small packages are dropped, tossed, and handled 27 times in a one-way shipment. Without padding, items can slide around or fall out in the shipping process, sometimes causing irreparable damage. Placing your objects in a sealed padded envelope is a much sturdier and more secure way to pack and ship your valuable objects and products. Bubble mailers are made with Bubble Wrap lined inside. They give added protection for delicate items. Padded envelopes are ideal for transporting important flat itemssuch as Blu Rays, CDs, books, and jewelrysecurely. Packages can bounce around during the shipping process, so finding a durable, padded envelope means you dont have to worry about your valuables breaking.