Ink cartridge code: 252XL ink cartridge Package includes: [4 packs] 1x black |1x cyan |1x magenta |1x yellow Page Yield: Each 252XL black ink cartridge can hold 1100 pages; each 252XL color ink cartridge 1100 pages Printer compatibility: WF-3620, WF-3630, WF-3640, WF-7110, WF-7210, WF-7610, WF-7710, WF-7620, WF-7720 Printer. Note: 1. Please confirm your printer model before placing an order. 2. When in use, slowly remove the yellow sealing tape from the ink cartridge without removing other labels. 3. Please avoid touching the chip. 4. If the word "non-original" appears on the computer, click "OK" successively, and the printer can continue printing. 5. If your printer does not recognize the ink cartridge, remove the ink cartridge and reinstall it three times. Customer service: 1. If you have any questions, please feel free to contact us via "contact seller ". 2. We hope everyone has a good shopping experience for this product, we will do our best to provide you with further assistance .