1x Black High Yield Printer Cartridge - 25,000 Pages - for OptraT610/612/612N/614/616 Series. Now that you’ve made a great choice with your Optra T laser printer, look to the supplies that were designed in conjunction with the printer. Lexmark offers high yield, prebate cartridges to help you with fewer interventions while saving you money up-front. And, Lexmark designed these cartridges, so that they will fit across the entire Optra T family. Easy and economical - just the way you like it.