High quality UV proof ink (dye based) won't clog your printheads. We also sell pigment and sublimation ink. Please check our other listing at our etsy store 100ml(3.3oz) each bottle. One color per bottle. We ship 1 bottle per color(total of 4 bottles) by default. If you need more of a particular color, such as black, let us know. We can always work with you to meet your needs. Each bottle can fill our refillable cartridge at least 9 times. So for $16 you are getting the equivalent of 36 cartridges. That's how much money you will be saving. Accurate colors. Formulated for your printer's best printing results Economical. Filling each cartridge for less than 40 cents Easy to use. The bottle has a snout which can pour ink accurately into the CISS reservoir Needs more black ink? Please contact us we have the ink pack with 400ml black ink Please note original or OEM Epson cartridges can not be refilled. You need a CISS system or our refillable cartridges (if you are not sure which model you need, please send us a message. It's always a better idea to ask and confirm the model, than guessing. Some models sound similar but may be totally incompatible. You don't want to get upset after waiting a week and find out you've ordered the wrong ink cartridge, and we don't want to get upset when we ship the ink cartridges and a week later our customer finds out he/she ordered the wrong item and asks to return the item) in order to use these bulk ink. If you buy our refillable cartridge and ink together, we can issue a small partial refund since we can ship them together and save on shipping charge.