Exclusive, uniquely keyed, EcoFit ink bottle makes it easy to fill each color tank with Genuine Epson Ink that delivers reliable performance and brilliant results. Epson strongly recommends the use of genuine ink to ensure optimal print quality and performance. Use of non-genuine ink could cause damage not covered under the printer's limited warranty. This standard-capacity bottle of supertank printer ink is designed to fit Epson WorkForce ST-M1000 Monochrome Printer, WorkForce ST-M3000 Monochrome MFP Supertank Printer, EcoTank ET-M1170 Wireless Monochrome All-in-One Supertank Printer, EcoTank ET-M2170 Wireless Monochrome All-in-One Supertank Printer and EcoTank ET-M3170 Wireless Monochrome All-in-One Supertank Printer. It yields approximately 6.000 pages.