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Jiffy AirKraft Bag Size 5 260x345mm Gold GO-5 Pack of 10 MMUL04605 These Jiffy Airkraft padded mailers are lightweight and economical to help keep postage costs down. The mailers feature a fully laminated lining of Astro SupraBubble for extra strength and puncture resistance, and a strong self-seal closure. Ideal Jiffy AirKraft Bag Size 5 260x345mm Gold GO-5 Pack of 10 MMUL04605