Laser Tek Services Black Toner Cartridge for Xerox 006R01513 6R01513 WorkCentre 7525 7530 7535 7545 7556. Each Xerox Toner Cartridge is professionally engineered to produce the highest quality printouts for your Xerox laser printer. This toner cartridge is an ideal choice laser toner cartridge for your Xerox Printer. Laser Tek Services Remanufactured high yield laser toner cartridges deliver excellent, dependable results, page after page. You can depend on our remanufactured toner cartridges!