Mailers Robust plastic, size: 42 x 52 cm (16.5 "x 20.4") Material: PE. White color. Packing quantity: 50 packs.Plastic Polyethylene Self-sealing Packaging Quick-peel and resealable seals only need to pack the contents, peel off and then close, done Easy to pack.Envelope Mail Environmentally friendly materials: Made of new materials, without odor, without allergies, with strong load-bearing capacity and safe to use.White PouchIdeal for business and private use. Send your goods and items safely and reliably to your customers, family members or friends.100% customer satisfaction, if you are not satisfied with the product, you can contact us by email at any time, we will provide satisfactory service in the first time, you can get a full refund for no reason, dont worry, please buy anytime.