The LC1000C, LC1000M and LC1000Y ink cartridges contained in this LC1000RBWBP Rainbow Blister Pack have been expertly designed to work seamlessly with your Brother printer, providing you with highest quality results, time after time. Though using cheaper, non-branded cartridges might save you money in the short-term, theyre not as compatible with your machine. Its possible that using these often-inferior products could cause printing problems and even damage your printer so why take the risk? By choosing this genuine LC1000RBWBP Ink Cartridge Rainbow Blister Pack, youll ensure that your printer continues to perform at its very best and also that any warranty you hold remains valid, providing you with extra peace of mind all round.