6" x 6" x 12" Tall Corrugated Boxes. Tall Corrugated Boxes open and load on their ends saving time and money on sealing! May be used in place of mailing tubes. Boxes are manufactured from 200#/ECT-32 kraft corrugated. Sold and shipped flat in bundle quantities. 25/Bundle.SHP6612. 6612. Shoplet select Shoplet select Tall Corrugated Boxes.