We use genuine cartridges, so there are no compatibility issues. You can use them with confidence. This product has had its remaining ink level indicator reset, so it will display as full. Color changes are possible, subject to stock availability. We can provide up to 2 BK cartridges. Please request via comment if you wish to change the color. 4-color set of recycled ink Brother genuine ink cartridge LC-3111 Compatible ink, fully refilled We have refilled Brother 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 this 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 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 appear as shown in image 2, but the remaining ink level indicator will display normally. --------------------------------- Brother LC-3111 4-color set 1 set: 4 colors x 1 - 1,680 yen ---------------------------------- If there is any damage or initial defect upon arrival of the product, please contact us before leaving a review. We inspect ink cartridges before shipping, so we do not expect any recognition failures or printing defects, but if they occur, we will accept returns or exchanges. Please feel free to contact us via transaction message.