An Oki colour laser printer needs a genuine Oki 43381722 magenta drum unit to print images correctly. The magenta Oki 43381722 imaging drum can get worn-out from constant use and it needs to be replaced after a particular number of pages have been printed. An Oki 43381722 magenta image drum will require replacement if there are lines and black spots on the printed materials and the images look lighter or faint. It is important to replace a used Oki 43381722 drum with the same genuine product for seamless performance and full compatibility with the low-melt magenta toner. Expect the magenta 43381722 drum to last for 20,000 pages.