Replacement for HP # 21 Black HP part # C9351AN Re-manufactured cartridge Ink volume: 5mL Approx. Yield: 150 pages Printers:- Deskjet 3910, 3915, 3930 Series, 3940, D1330, D1341, D1360, D2330, D2360, F340, F380 Officejet 4315 PSC 1410 FAX 1250 H-0021$12.90