The product is a set of 50-500 and 500-2000 poly bubble mailers padded envelopes shipping mailing bags of various sizes, manufactured by Coolpkg in the United States. These gray mailers are made from a 4-layer composite polyethylene bubble film, making them water proof, moisture resistant, and tear resistant. They are approved for use with USPS, UPS, DHL, and FedEx for shipping and mailing purposes. The price 100 is $49 500 is $199, 1000 is $359
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