Amazon.com: Universal Fixed-Depth Brown Corrugated Shipping Boxes, Regular Slotted Container (RSC), X-Large, 12" x 18" x 6", Brown Kraft, 25/Bundle : Industrial & Scientific
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Smoothmove Prime Moving/storage Boxes, Medium, Regular Slotted Container (rsc), 18" X 18" X 16", Brown Kraft/blue, 8/carton | Bundle of 10 Cartons - Walmart.com
Regular Slotted Containers | RSC Boxes | Abbe
Regular Slotted Cartons from Cactus Containers in USA