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Amazon.com: Classroom Keepers Sturdy Cardboard Mailbox, 10-Slot, Blue, 16-5/8"H x 21"W x 12-7/8"D, 1 Unit : Tools & Home Improvement
Pacon Classroom Keepers 15-Slot Mailbox, Corrugated Box Material, 16 3/8" x 31 1/2" x 12 7/8", Blue (PAC1308) | Staples
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