With advanced printers like your OKI colour laser machine you need more than toner cartridges to ensure its continued operation. You also need essential maintenance items like the original OKI 43449705 transfer belt.Why entrust the running of the OKI MC851cdtn (and all other compatible printers) to anything but a genuine OKI 43449705. Products produced by the manufacturer of your printer work flawlessly with your machine and the OKI 43449705 transfer belt lives up to the companies reputation.If however you should ever have any problems with the 43449705 transfer belt, OKI offer a direct warranty, but this is very rarely needed.