Exclusive, uniquely keyed, EcoFit ink bottle makes it easy to fill each color tank with Genuine Epson Ink that delivers reliable performance & brilliant results. Epson strongly recommends the use of genuine ink to ensure optimal print quality & 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 & EcoTank ET-M3170 Wireless Monochrome All-in-One Supertank Printer. It yields approximately 6.000 pages.