TONER DRUM 28A

Integrated Unit: For most HP laser printers, including those compatible with the 28A, the photosensitive drum unit is built into the toner cartridge. This means that every time you replace the toner cartridge, you are also replacing the drum unit, ensuring consistent print quality and eliminating the need for a separate drum replacement schedule.
Toner Function: The cartridge contains the black toner powder which creates the text and images.
Drum Function: The drum unit is an electrically charged cylinder that attracts the toner particles and fuses them onto the paper with heat and pressure.
Compatibility: The HP 28A toner cartridge (CF228A) is compatible with a range of HP LaserJet Pro printers, including the M403 series (M403d, M403dn, M403n, M403dw) and the MFP M427 series (M427dw, M427fdn, M427fdw).
Page Yield: The standard HP 28A Black Original LaserJet Toner Cartridge
has a page yield of approximately 3,000 pages (based on ISO/IEC 19752 standards).