Auto Duplex Unit
Easy to use optional two-sided HP LaserJet printing duplexer. Get two-sided printing for creative output formats such as booklet printing. Imagine the money you will save by reducing your paper usage!
HP C4782A, LaserJet 8000, 8100, 8150, LaserJet 8500, 8550, A3, A4, B4
HP C4782A. Compatibility: LaserJet 8000, 8100, 8150, LaserJet 8500, 8550. ISO A-series sizes (A0...A9): A3, A4, ISO B-series sizes (B0...B9): B4