If you have any questions, please contact us. All messages will be answered within 24 hours, and our customer service team will be waiting for you at any time. Reliable Performance: Compatible 502522 ink bottle contains high quality and brilliant results for Office and Home everyday printing. Strict testing before delivery from the factory, to ensure the quality of printing. Estimated Page Yield: Up to 7500 pages per Black regular ink bottle and 6000 pages per color regular ink bottle (at 5% coverage on A4 document). Package: 1 x compatible 522 black ink, 1 x compatible 522 cyan ink, 1 x compatible 522 magenta ink, 1 x compatible 522 yellow ink. Notice: The ink capacity is 70ml as the text on the label, but in order to adapt to the characteristics of the printer, the bottle we use is 100ml, so even if the ink is not full, it meets the capacity standard. Compatible Printer: Compatible 522502 Refill Ink Bottle Replacement for Ecotank ET-2720 ET-2803 ET-2750 ET-3700 ET-2720 ET-4800 ET-3750 ET-4750 ST-2000 ST-3000 ST-4000 All-in-One Printer Ink.