The Konica Minolta Drum Unit IUP-35 Black (AAJV01D / IUP35K) is a genuine OEM imaging unit for Konica Minolta bizhub models such as the C3350i, C4050i, and related series. It converts the latent electrostatic image into visible black toner on paper, enabling crisp text and solid monochrome output. It is rated for about 200,000 pages under standard conditions.