This is the kyocera black tk 3100 ink toner cartridge it also goes under part number tk 3100k and is ideal for volume printing in business kyocera mono laserjet toner cartridge makes business documents look professional with crisp black text kyocera cartridges handle the most demanding printing jobs with ease high capacity cartridges help you save on frequent printing kyocera are known for reliable low maintenance toner cartridges to create a professional impression with every sin