
1) GPO items 2) PO box filler 3) PO box inserts 4) PO box items 5) PO box stuffers 6) PO boxful 7) PO deliveries 8) PO pieces 9) PO pile 10) PO stack 11) Items in a PO box 12) Po box contents 13) Po box fillers 14) PO items 15) Pob contents 16) POB fillers 17) This puzzle has 373 18) USPS deliveries
Found on
https://www.crosswordclues.com/clue/ltrs

abbreviation: liters
Found on
http://www.encyclo.co.uk/local/20021
No exact match found.