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. Certificate: ISO-9001 and MSDS certificate approved. Strict testing before delivery from the factory, to ensure the quality of printing. Reliable Performance: Compatible 502522 ink bottle contains high quality and brilliant results for Office and Home everyday 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). Compatible Printer: Compatible 502522 High Capacity Refill Ink Bottle Replacement ( Not for Sublimation) for ET-2700 ET-2750 ET2760 ET-4760 ET-3760 ET-2850 ET-3710 ET-3850 ET-3750 ET-4850 ET-3830 ET4750 ET3700 ET-15000 ET-2800 ET-2803 ST-2000 ST-3000 ST-4000 Printer (Regular Ink).