Poly Mailers 24×24 2.0Mil Self Sealing Shipping Plastic Envelopes Mailing BagsFast & Free Shipping Brand New, Sealed! Please note that you will be purchasing a Brand New Poly Mailers 24×24 2.0Mil Self Sealing Shipping Plastic Envelopes Mailing Bags. The plastics are in the original sealed package that has never been opened and will arrive in perfect condition, as if it were received from the store. Please refer to the photographs provided for a greater general idea of the cosmetic quality of the packaging.