This cartridge contains original Epson UltraChrome PHOTO BLACK (PK) ink, designed for use with Epson SC-P6000/P7000/P8000/P9000.UltraChrome inks enable high quality prints, high retention level, bright colors and deep blacks.350ml ink cartridges are ideal for a workflow medium and save money The BLACK PHOTO (PK) ink cartridge is in the format of 350 ml, and bears the reference number T54X1. It replaces the ref. T8241.This item is also available in 700 ml format.IMPORTANT:The new generation Epson cartridges (T54X.. and T55K..) for SureColor P6000, P7000, P8000 and P9000 are gradually replacing (while supplies last) current cartridges (T804.. and T8241. 824..), since June 2023. These are always original Epson cartridges containing Ultrachrome HDX/HD inks whose reputation for quality is no longer to be made. The only difference between these two generations is the presence of a new chip free from ILS (Ink Level Sensor). In the absence of this element serving to accurately count the number of ml used, the consumption will be calculated/estimated according to the printing modes and will then be recorded in the new chip.To use these new cartridges, or a mixed of cartridges with and without ILS, it is necessary to make an update of the firmware of the printer. It is therefore important to keep the firmware version available on the Epson website. Please refer to the documentation included in the carton of each new generation cartridge.