for example). A comparison would be helpful. I bought other refills that were literally half the size of a bottle. When filling a 15A cartridge (regular) versus a 15X cartridge (extra high capacity), you want to know what's in those bottles and what capacity the cartridge is supposed to be. Just a tip, you should empty the waste toner bottle or after a few refills you will be left with dark streaks on both sides of the overflow page. Makes the whole process even more chaotic, but cartridges print cleaner and last longer.