Other than the commonly used Ricoh toner cartridges, imaging drum units (like the B2242042) are the most well-known consumables in laser printers. Designed to handle the black powder that comes from the Ricoh toner cartridge, this genuine B2242042 image drum plays an incredibly important part in the printing process.Drum units play such an important role, that original Ricoh components are always preferable if you can justify one. This genuine B2242042 black imaging drum unit is guaranteed to be compatible with the Ricoh Aficio MPC4500 and all other printers found listed on this page.