The Epson 664 ink series is commonly used in various Epson EcoTank printers. For the black ink, you would typically be looking for the Epson 664 Black ink bottle. This ink is compatible with several EcoTank printer models. However, for specific compatibility and availability, it's best to refer to Epson's official website or check the documentation that came with your printer. Additionally, you can find compatible ink options from authorized retailers or directly from Epson. Always ensure you're using compatible ink to maintain print quality and avoid potential issues with your printer.