These products are guaranteed to work with your Oki B840dn printer.
Oki b840dn is an A3 monochrome LED laser printer comprising the robustness, high- speed and long lasting output. It brings you the A3 and A4 mono printing closer to the workgroup of any size. It provides a very convenient and high speed printing of up to 40 ppm and prints documents at a size that gives them a unique outlook. The printer has built-in PCL/PostScript for the maximum platform flexibility and application support. The model also bids the duplex printing to reduce running costs and hence emerges as a right choice to print the A4 documents with the flexibility of the A3 output.