HP LaserJet Automatic Two-sided Printing Units
Automatic duplexer assembly - For LaserJet 4200/4250 and 4300/4350 series printers
Q2439-69003
Price: $241.19
Duplexer roller assembly - Mounts in the center of the duplexer unit - For both duplexer model numbers
RB1-6822-000CN
Price: $47.94
Duplexer assembly - Enables double-sided printing by flipping the page over in the printing process
C8532-69003
Price: $33.91
1