HP Q2439A AUTOMATIC DUPLEX ASSEMBLY FOR LASERJET 4200/4300 PRINTERS (Refurbished) -  This Duplexer (duplex printing accessory) allows automatic printing on both sides of paper.

*Refurbished items come with 90-day parts and labor warranty.  

* F.O.B. Austin, Texas. 

 * Used HP & Compaq Accessories are fully refurbished by HP certified technicians at 360 Technologies, Austin, Texas