The HP #975A Black Ink (L0R97AA) is a high-quality ink cartridge designed to deliver crisp, clear text and sharp graphics. With a page yield of up to 3500 pages, this ink cartridge is perfect for busy offices or homes. It is compatible with select HP printers and is easy to install. Printer Compatibility: HP PAGEWIDE PRO 452,HP PAGEWIDE PRO 477,HP PAGEWIDE PRO 552,HP PAGEWIDE PRO 577,HP PAGEWIDE 55250,HP PAGEWIDE 57750