I needed a real 4100D3/XAA toner cartridge. You advertised that this is what was going to delivered. See your advertisement!! What was really delivered was an "4100D3/SEE". Exactly as expected, this did not work in my printer, copier. The gear will not mesh properly and it pops up repeatedly. It was returned. Return process was fairly simple. No offer was made to actually deliver an XAA. NOTE: The existing cartridge (an "XAA") works perfectly.