This is a compatible memory upgrade module. It works in the following Xerox printers: Phaser 6300DN, Phaser 6300N , Phaser 6350DP, Phaser 6350DT, Phaser 6350DX, Phaser 8550DP, Phaser 8550DT, Phaser 8550DX , Phaser 8500, Phaser 7400.