We sell 2 types of refill kits (inkjet and toner). These are do-it-yourself type products that come with ink (or toner), tools, and instructions for you to refill your own cartridge (see each refill kit item description for specific details). Refill kits are not for everyone. Although we have a 99%+ customer satisfaction rate with these products, it is important to realize that the quality of a refilled cartridge is dependent on more than just the ink or toner that you put into it. Most quality issues with refilling cartridges are a result of quality issues with the empty cartridge that is being refilled, and not with the ink or toner that you are refilling into the cartridge. If your cartridge is already printing with streaks, smudges or lines, or if the cartridge’s print heads have dried considerably due to non-use (for inkjets), your cartridge is basically already defective or exhibiting signs of defect, and “refilling” it will not bring it back to life. Don’t expect our refills to perform miracles – they are intended to refill functional cartridges. It is always recommended to refill an inkjet cartridge BEFORE it completely empties and while it is still printing well, or very soon after it empties so the print heads don’t dry beyond repair. For toner cartridges, these have multiple moving parts that do wear out and affect quality. Our refills are intended to provide the same quality prints as the last few pages that your cartridge printed before you refilled it.