Priority Mail Medium Flat Rate Boxes, 25/pack

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The Priority Mail Medium Flat Rate Box features predetermined rates regardless of weight (domestic only). USPS SKUs: Priority Mail Medium Flat Rate Box (11 1/4" x 8 3/4" x 6"): O-F RB1 Priority Mail Medium Flat Rate Box (12" x 3 1/2" x 14"): O-FRB2 Maximum Order: 20 bundles of 25 Quantity/Pack: 25 Call 1-800-610-8734 for orders exceeding the maximum allowable order size Shipping Cost: This product is free and will ship separately with no shipping charge Show more