This is brand new in the package, never opened. It is a HP #45 black ink cartridge for a HP printer. The ink volume is - 21 ml - it is compatible for a fax or printer - It is Compatible for Models - HP DesignJet 700, HP DesignJet 750C, HP DesignJet 750C+, HP DesignJet 755CM, HP DesignJet 755CM+, HP DesignJet 1000 series. HP pigmented black ink provides dense, robust, fade resistant printouts &clog free performance throughout the life of the print cartridge. Genuine HP inkjet print cartridges provide reliable, professional, quality printing every time. Visible ink level indicator shows when it’s time for a replacement. I purchased a new printer and it doesn't use this style of ink cartridge. My loss, your gain! Take a look!