OKGO!INK T522 502 Ink Refill Bottles, 6-Pack for EcoTank Printers

If you need replacement ink for a compatible Epson EcoTank printer, this six-bottle set supplies black and color dye ink in refill bottles. The pack contains three 100 ml black bottles and one 100 ml bottle each of cyan, magenta, and yellow. Which printer models are listed, and what should you know before choosing third-party refill ink?

Quick overview

OKGO!INK identifies this set as compatible T522 refill ink, with T502 also appearing in the model number. It is intended for direct refilling and is explicitly described as not being sublimation ink. The stated printer list includes models such as the ET-2800, ET-2803, ET-4800, ET-2720, ET-2840, ET-4700, ET-4810, ET-2760, ET-2850, and ET-3850, along with other ET and ST models. Since compatibility reports from buyers are mixed, including reports of problems with the ET-2800, match your exact printer model to the product information before relying on the listed compatibility.

The manufacturer gives page-yield estimates of up to 18,000 pages for the three black bottles combined and up to 8,000 pages per color bottle, based on 5% coverage on A4 paper. Those are stated estimates, not a guarantee of how many pages a particular printer or print job will produce. Buyers describe the colors and print quality positively and often find the bottles easy to use, but feedback on compatibility and whether the ink fills a printer as expected is mixed.

Best use cases

This refill set is aimed at owners of the listed EcoTank and WorkForce printers who need both black and color ink in bottle form. The extra black supply may be useful for a household or workspace that prints more text than color, while the separate cyan, magenta, and yellow bottles provide the three listed color inks. It makes sense if your printer model is included and you want a multi-bottle refill set rather than a single-color purchase.

For a practical check before opening the bottles, compare the complete model number on your printer with the compatibility list, especially where similar model names appear. A refill set is a different buying approach from purchasing printer-brand ink, here, the key decision is whether the listed compatibility and third-party ink format suit your specific printer. It may not suit you if you need sublimation ink, since this product is expressly described as not being for sublimation.

Tips for day-to-day use

Keep the bottle colors matched to the corresponding printer tanks, and use the ink only for a printer identified as compatible. The package is described as six 100 ml bottles totaling 600 ml: three black, one cyan, one magenta, and one yellow. That breakdown is more useful for planning refills than the general “black and color” label alone. The stated yield figures assume 5% coverage on A4 paper, so actual output will depend on the content being printed.

Buyers commonly mention easy refilling and long-lasting ink, while some report that the bottles do not fill their printers as expected. Treat those experiences as variable rather than a promise about your printer. If compatibility or refill behavior is a concern, the mixed reports make your exact printer model and the refill instructions particularly relevant.

What to clarify

Which printers are listed as compatible? The supplied list includes multiple Epson ET models, including the ET-2800, ET-2803, ET-4800, and ET-4810, as well as WorkForce ST-2000 and ST-4000. Check the full list for your exact model.

What comes in the pack? Six bottles: three 100 ml black bottles and one 100 ml bottle each of cyan, magenta, and yellow.

Can it be used for sublimation? No. The product information says it is not sublimation ink.

When it makes sense

Choose this set when your printer appears on the compatibility list and you need a mix of black and color refill ink in one pack. The bottle quantities and stated yield estimates make the contents clear, but they do not resolve the mixed reports about compatibility or filling. If your model is one of the models buyers have questioned, weigh that uncertainty before choosing this third-party refill set.