Hewlett Packard LaserJet Auto Duplex Unit for LaserJet 4200 and 4300 series printers - Q2439A
(Manufacturer: HEWLETT PACKARD - Part No: Q2439A - SKU: 62346)

Save time, money, and paper when you use HP’s two-sided printing accessory. The accessory prints both sides of the page automatically, so you can concentrate on more important work. You’ll see budget savings because paper consumption is cut in half.