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Designed to offer a lower cost alternative for packages going shorter distances, the Priority Mail Regional Rate Box™ B1 is a top loading box for up to 20 pounds. Regional Rate Boxes are often the most economical option even when shipping cross-country. Combine the speed and convenience of Flat Rate Priority Mail shipping with zone pricing to reduce costs. All free USPS supplies ship via Standard Post (formerly known as Parcel Post).
- Inside Dimensions: 12" x 10-1/4 x 5"
- Outside Dimensions: 12"-1/4 x 10-1/2" x 5-1/2"