This genuine Lexmark 78C0W00 waste toner collection unit keeps spare toner from affecting the quality of your prints.No matter how efficient your Lexmark laser toner printer is, it will leave behind residual toner that can affect the quality of your prints or even the running of your machine. Products like the Lexmark 78C0W00 contain this leftover toner and keep everything inside your laser printer ticking over nicely.With this Lexmark waste toner bottle being offered at a very reasonable price and lasting for an estimated 25,000 prints, we can see no reason not to purchase an original 78C0W00.