The Lexmark C540A1YG Yellow Genuine Return Program Laser Toner is a high-quality printer accessory designed specifically for Lexmark printers C540, C543, C544, and C546. This genuine/original toner cartridge ensures optimal print quality with its laser print technology, delivering vivid yellow color prints. With dimensions of 75 lbs/in in length and 32 lbs/in in width, this toner is compatible with the specified Lexmark printer models, providing reliable and consistent printing results.Boxes are unopened - brand new! Ask questions before buying. Thanks!