The Regular Slotted Container (RSC) box is the #1 most common box style in the world. All flaps have the same length, and the two outer flaps meet at the center of the box, ready to be sealed with tape. Tape the tape top and bottom and you're ready to ship! Boxes are printed with HP Latex Inks that are UL ECOLOGO®, UL GREENGUARD GOLD Certified