Related Clues:

• PO item
• Photocopier tray size: Abbr.
• Kind of bag or box
• Hard-to-break plates
• Monogram pts.
• Photocopier option: Abbr.
• P.O. sackful
• Env. inserts
• Snail ___
• It may contain a lot of letters
• DHL delivery: Abbr.
• Abbr. on a copier tray
• Four letters?
• Blue box material
• Copier abbr.