Welcome to the Xerox 4590 product page. Here you can find information and pricing for your Xerox 6R1237 Genuine Xerox Toner Cartridge. Easy online ordering of your , can be completed from this page. Tonerprice.com backs all of our cartridges with our exclusive warranty. As always, we provide free ground shipping on orders over $75 within the contiguous United States from 5 warehouses nationwide.