Genuine Xerox solid ink sticks are an integral part of our simple, intuitive supplies system- featuring interlocking ink shapes and a unique numbering system, making the ink loading process easy. Our high-performance solid ink formulations deliver brilliant color and sharp text every time, and can be used with either Xerox Phaser 8500 or Phaser 8550 color printers. They produce an average of 3,000 pages (at 5% average area coverage). Genuine Xerox printers and supplies-They're Made for Each Other.