Premium Quality 12A5745 Toner Cartridge compatible with the Lexmark Optra T610, T610SX, T610N, T612, T612N, T612S, T614, T614N, T614NL, T614S, T616, T616N; OptraImage 610, 614. The use of compatible supplies does not void your printer warranty. Product Detail Ninestartechonline.com