The HP OfficeJet Pro 1175 uses compatible ink in two standard sizes: black 45 (51645A), about 1,100 pages, and tri-color 23 (C1823D), about 690 pages. The same ink also works with the HP OfficeJet Pro 1170, OfficeJet Pro 1170 Cs and OfficeJet Pro 1170 Cx. Same-day shipping on most orders.
