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HP Duplexer - C4123A - for HP LaserJet 4000 & 4050 Series Printers
Product Description Allows automatic printing on both sides of paper Amazon.com Improve printing productivity by adding the HP C4123A duplex assembly to your existing HP 4000 series LaserJet printer. This is a paper-handling accessory that virtually doubles your printer output by allowing automated printing on both sides of the paper. You can expect to see a substantial reduction in paper costs and time spent printing. You also expand the uses for your printer--you can print and finish booklets, brochures, marketing materials, and more completely in-house. The duplex assembly is designed to support all media types and sizes that the attached model of printer supports. You can easily install this accessory yourself, and

Price is $75.00
Price: $74.99