Genuine Epson 277XL Black Ink High Yield
[C13T278192]

This arrived in a very quick time. According to the manufacturer, the standard cartridges yield 240 pages, these yield 500. Standard cartridges cost (here) $15.51 and XL cartridges are $26.18. Approximately double the amount of printed pages for approximately $11.00 extra. And, as this was ordered with other items, there was free delivery. Sounds good to me.