The Ankink 502/522 Ink Refill Bottles are a set of 6 bottles compatible with Epson printers. With an expiration date of 09-2027, these refill bottles are designed for inkjet print technology and come in cyan, yellow, magenta, and black colors. The bottles are backed by a manufacturer warranty of 2 years and are compatible with models such as ST-15000, ST-4000, ET-3710, and ST-2000. Made in China, these refill bottles offer a convenient and cost-effective solution for maintaining your printer's ink levels.