Bosumon 21XL 22XL Ink Cartridge Compatible For HP 21 22 Use in HP DESKJET 3910 3915 3918 3920 3930 3930v 3938 3210 3210v (1 Black, 1 Tri-Color) Color: Black, Tri-Color (Cyan, Magenta, Yellow) Contents: Remanufactured HP 21 & HP 22 (1 Black, 1 Tri-Color) 2 Pack Page Yield: up to 400 pages per black cartridge & 300 pages per tri-color cartridge Printer can recognise it directly.Please confirm the ink cartridge model your printer used before purchasing. Warranty: CE, TUV, ROHS, ISO9001, ISO4001 International Quality Certified.