HP Officejet 4634 e-All-in-One (D4J78B)
MFG Part Number: D4J78B
8ppm black, 5ppm color, 1200 x 600 DPI, 1 USB 2.0;Wireless 802.11b/g/n
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ADF Roller Kit parts for D4J78B HP Officejet 4634 e-All-in-One Printer
D4J78B-ADF_Roller_Kit
ADF Roller Kit - ADF upper pick roller replacement kit. these are the rollers that feed paper into the feeder to be scan copy or faxed.
Officejet 4634 e-All-in-One Printer parts list