21 x 21 x 21 Corrugated Boxes 15/Bundle

These corrugated boxes are standard test RSC (Regular Slotted Carton) and come in a classic brown color. They meet Federal Mil Spec PPP B 636, ensuring high - quality. All boxes ship flat, making them super easy to store and convenient to ship. The sizes mentioned represent the inside dimensions of the box, listed as Length, Width, and Height.

Using these corrugated boxes is a breeze. First, unfold the box from its flat - shipped state. Then, fold the flaps to form the box structure. You can use packing tape to secure the bottom flaps. When packing, place your items gently inside the box, making sure not to overfill it to avoid damaging the box or its contents. As for storage, keep them in a dry place to prevent the corrugated material from getting wet and losing its strength. If the boxes get dirty, you can wipe them with a dry cloth. That's all you need to know to make the most of these great boxes!