The product is a 5 pack of T502 ink refill bottles by OS Inkjet, designed for Epson 502 EcoTank printers. These black ink bottles are specifically compatible with various Epson printer models such as WorkForce ET-3750, EcoTank ET-3760, and Expression ET-2700. Made in China, these refill bottles are ideal for inkjet print technology and provide reliable and high-quality printing results. This product offers a convenient and cost-effective solution for refilling ink tanks in Epson printers, ensuring consistent and professional printing performance.