The original Kyocera DK-68 drum unit ensures correct build-up of prints. The drum unit works closely with the toner in the printer. With a high capacity (300,000 pages) this part does not need to be replaced often and can be printed frequently.
Note: this is a drum, not a toner!
A drum is not a substitute for an empty toner. Only order a drum if your laser printer indicates that the drum needs to be replaced.