The product is a new genuine Lexmark yellow developer specifically designed for Lexmark C540, C543, C544, and C546 printers. This developer cartridge, model C540X34G, is compatible with various Lexmark printer models such as C540 dw, C540 n, C543 dn, and C544 dn. With a bright yellow color, this developer cartridge ensures high-quality printing results for your documents and images. Trust in the Lexmark brand for reliable and consistent printing performance.