We use genuine cartridges, so there are no compatibility issues. You can use them with confidence. This product has its remaining ink level display reset, so it will show as full. Color changes are possible, subject to stock availability. Only one BK is available. Please request via comment if you wish. 4-color set of recycled ink Brother genuine ink cartridge LC-3111 Compatible ink, fully refilled We have refilled Brother's genuine cartridges with high-quality compatible ink. If you are already using compatible ink, or if you are considering trying ink other than genuine, please give it a try. Based on our repair experience, we believe that the compatible ink we use rarely has a negative impact on the printer. Please use it with confidence. ----------------------------------- All products on sale are cartridges that have been tested for sensor response and operation, so please purchase with confidence. Since we have refilled with compatible ink, a "?" mark will be displayed when installed, but the remaining ink level will be displayed normally. --------------------------------- Brother LC-3111 4-color set 1 set of 4 colors x 1: 1,580 yen ---------------------------------- If there is any damage or initial defects upon arrival of the product, please contact us before leaving a review. We inspect the ink cartridges before shipping, so we do not expect any recognition failure or poor output, but if it occurs, we will accept returns and exchanges, so please feel free to contact us via the transaction message.