The genuine OKI 4510371 series boasts some of the highest capacity imaging drums we have ever come across. The cyan image drum from the range (the OKI 45103715) has been built to be durable enough to offer an estimated 40,000 prints before it needs replacing, and for most offices this will take quite some time!Each and every component of the original OKI 45103715 drum has been designed to work flawlessly with all compatible printers in the C911 and C931 series. You can trust this OKI 45103715 imaging drum with your most important work and as a genuine product, you can be certain of the best possible results from your colour laser printer.