If you are using a Phaser 850 workgroup color printer, you understand the capabilities and savings that solid ink can offer you. Media Sciences solid ink sticks will provide you with significant savings, along with great color output, so you can print and present in color with ease. MSI solid ink sticks are a great value and a great choice!These solid ink sticks are designed for the following systems: Tektronix Phaser 850 color printer by Xerox.For a complete compatibility list please refer to the original manufacturer's web site.