Print cartridge is designed for use with Lexmark CX310 and CS310dn. With Unison Toner, you'll get consistently outstanding print quality and increased office productivity. Documents printed with Unison Toner look great from the first page to the last because of its uniquely engineered formulation. Genuine Lexmark supplies and Lexmark printers perform best together, giving you the advantage of consistent reliable printing and professional-quality results. Cartridge yields approximately 2,500 pages.