Compatible 13T0101 Laser Toner Cartridge for the Optra E310 & E312 Printer (13T0101). Swift Ink is the best internet source for compatible Lexmark cartridges. Our high-quality and low prices for Compatible 13T0101 Laser Toner Cartridge for the Optra E310 & E312 Printer will save you money with every print. Our 13T0101 cartridges are guaranteed to work in your Lexmark printer. Our high-quality compatible Lexmark cartridges are fully guaranteed and environmentally friendly, giving you the best print quality every time. We have the lowest price on compatible and remanufactured Lexmark ink cartridges and toner cartridges.