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  1. Showing 1 - 36 out of 170 results for "usps flat rate shipping boxes"
    1. AVIDITI Shipping Boxes Flat 12.125…
      ($1.16 / 1 ct)
      A
      Amazon.com
      delivery truckFree shipping
    2. Medium Moving & Shipping Boxes 1…
      ($5.50 / 1 ct)
      A
      Amazon.com
      delivery truckFree shipping
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    • Flat Rate Boxes | View Pricing & Features

    • Packaging Supplies | In Stock – Ships Today | Fast Delivery

    • Walmart.com | Your Postal Items | Mailing & Shipping Supplies

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