Is this HP original or some knock-off aftermarket product? Just don't have good luck with aftermarket stuff for these printers.

Don, it is HP. We're always so careful when ordering to make certain it is HP brand.

This is the part number that I need but when looking at the list of printers it is for, it does not list our 3800n?

Take a look at HP part RM1-2763. This is the fuser for your printer.

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Overview

Specs

Reviews

HP Fuser 110V Preventative Maint Kit

Model
Brand	HP
Model	CE484A

Details
Product Sort	Printer Accessories
Product Type	Fuser Kit
Color	Black
Compatibility	HP Color LaserJet Series Printers: CP3520 / CM3530
Weight	20

Features
Features	Ensure consistent color and optimum print quality every time with the HP Color LaserJet fuser kit. This kit is easy to install and is designed to work with your HP Color LaserJet CP3520 Printer series and HP Color LaserJet CM3530 MFP series.

Manufacturer Warranty
Parts	1 year limited
Labor	1 year limited

Additional Information
Date First Available	February 17, 2011