✓?Cover All Your Needs?: You can use 522 ink bottle refill combo for business, school, or around the house etc. ✓?Note?: T522 522 refill bottles are not sublimation inks. They are dye inks. 522 ink / T522 ink can only be printed on plain paper. ✓?Certificate?: ISO-9001 and MSDS certificate approved. Strict testing before delivery from factory, to ensure the quality of printing. ✓?Reliable Performance?:Print clearly, smoothly, high definition, easy to refill, not clog the print heads,great quality and brilliant results for Office and Home everyday printing. ✓?High Page Yield ?:Up to 4500 pages per 522 black ink ( at 5% coverage on A4 document). ✓?Compatible Printer?:Replacement for 522 epson ink work with EcoTank Expression ET-2720, Workforce ET-4700 ET-2800 ET-2803 ET-4800 Printer. ✓?Package contents?: 3 x 70ML Compatible Epson 522 black ink bottles (print out rich black,not clog the print heads,great quality).