Paper Transport UnitThe Paper Transport Unit moves pages from the printer to either the 1,250 Sheet Staple Hole Punch Finisher or the 2,250 Sheet Booklet Staple Hole Punch Finisher. The Paper Transport is compatible with all Lexmark A3 Series 9 printers, this option will increase productivity and support your business needs by allowing prints to move through any Lexmark A3 finishing options, which will then organize your print jobs. Note: This is a non returnable item.