***You can NOT successfully refill the #41 or #42 cartrdiges UNLESS you have an "A" after the cartridge number***
This bulk ink is compatible with the following Lexmark inkjet printers:
Lexmark X4850 / X4875 / X4950 / X4975 / X4975ve / X6570 / X6575 / X7550 / X7675 / X9575 / Z1520 Printer
Note: Lexmark offers for sale two different versions of the same cartridge: The regular version (41 & 42) is NOT refillable. It is the "Return" or "Rebate" cartridge you agree to return the empty cartridge to Lexmark. In return, Lexmark gives you a $5.00 discount off the cartridge. The "A" version (41a & 42a) can easily be refilled. However, the price of the cartridge is roughly $5.00 higher than the regular version, so most people unknowingly buy the regular version.
• Provides approx. 12 black refills